Strange behavior after screen replacement - Xiaomi Poco F1 Questions & Answers

Hey Folks
So I replaced my screen in order to fix those ghost touches. I ordered a screen from aliexpress and its totally fine.
But since the replacement my cellular network connectiom goes crazy.
1. I wasnt able to register the phone in the providers network, so I double checked the antenna and now am able to connect. (antenna wasnt correctly in place)
2. I only get Internet Connection for some time, then I have to reboot the phone to get internet back. That sounds for me just like a Software Issue so I reflashed everything. But I still got that problem.
Has anyone got an Idea?
I now ordered an antenna Cable and a daugther Board, but Im not sure about that board. What about frequencies? Do I need to get an eu Board or smt for switzerland?
Greetings
Smouker

I think that wifi sigaunal is joined to the daughter board. The cellular signal is handled by the plastic cover on top of camera lens. See if it is intact or have you played around or damaged it

i have almost the same problem.
Sim gets recognized but no network service.
Plastic cover looks undamaged...

wamy007 said:
i have almost the same problem.
Sim gets recognized but no network service.
Plastic cover looks undamaged...
Click to expand...
Click to collapse
Seems like exactly the same for me.
Plastic cover isn't damaged

i fixed it.
Antenna cable was broken.
Replaced it and everything is just fine now.

wamy007 said:
i fixed it.
Antenna cable was broken.
Replaced it and everything is just fine now.
Click to expand...
Click to collapse
smouker said:
Hey Folks
So I replaced my screen in order to fix those ghost touches. I ordered a screen from aliexpress and its totally fine.
But since the replacement my cellular network connectiom goes crazy.
1. I wasnt able to register the phone in the providers network, so I double checked the antenna and now am able to connect. (antenna wasnt correctly in place)
2. I only get Internet Connection for some time, then I have to reboot the phone to get internet back. That sounds for me just like a Software Issue so I reflashed everything. But I still got that problem.
Has anyone got an Idea?
I now ordered an antenna Cable and a daugther Board, but Im not sure about that board. What about frequencies? Do I need to get an eu Board or smt for switzerland?
Greetings
Smouker
Click to expand...
Click to collapse
Did your ghost touch issue disappeared as well....
My screen is rubbish. Doesn't recognise touches on the edges...and tiping is a nightmare. I ordered new screen from ali as well.... But i wonder did it do the trick? Did it help?
I hope yous can respond.
Thanks

Hunteres said:
Did your ghost touch issue disappeared as well....
My screen is rubbish. Doesn't recognise touches on the edges...and tiping is a nightmare. I ordered new screen from ali as well.... But i wonder did it do the trick? Did it help?
I hope yous can respond.
Thanks
Click to expand...
Click to collapse
Yep the screen fixed the touch Issue completly.
only the led light is waaay to bright lol. I guess they missed something there haha

wamy007 said:
i fixed it.
Antenna cable was broken.
Replaced it and everything is just fine now.
Click to expand...
Click to collapse
What a antenna cable? Please photo...

Related

Water Damaged Z2.. Trying to fix it!

Hello.
So to make a veeeery long story short, the phone leaked water in a lake at about 0.5 meters depth after a minute or two with flaps definitely closed (checked 5-10 times before submersion). The screen then flickered and died.
Phone gets sent away to a service center, tested and results unsurprisingly say its watertight so must be user fault. Sony and service provider refuse to help me in any way to fix the broken phone, so basically they say i have to pay it as normal (it was 4 weeks old at time of damage).
I received the phone back after countless phone calls to sony and service provider trying to get them to take responsibility, especially sony, but to no avail.
So now im trying to fix it myself. I took the phone apart, and the screen connector at the bottom was fried as expected. I bought a new screen and flex connector cable but still my screen wont show. The touchscreen works perfect, and so does the phone. When i connect it to my tv via MHL it works flawlessly. Every function including the new touchscreen works perfect, just that the screen is black on the device.
Am i missing something?? I really want to get this working so i can say IN YOUR FACE to this stupid company SONY. Im thinking the only thing it could be now is some faulty component on the mainboard regarding screen output, seems strange though that everything works perfect via MHL, especially the touchscreen.
Anybody have any ideas? Would be greatly appreciated if anyone can share similar experiences!
Cheers, Vincent from Sweden.
i
vinnibinni said:
Hello.
So to make a veeeery long story short, the phone leaked water in a lake at about 0.5 meters depth after a minute or two with flaps definitely closed (checked 5-10 times before submersion). The screen then flickered and died.
Phone gets sent away to a service center, tested and results unsurprisingly say its watertight so must be user fault. Sony and service provider refuse to help me in any way to fix the broken phone, so basically they say i have to pay it as normal (it was 4 weeks old at time of damage).
I received the phone back after countless phone calls to sony and service provider trying to get them to take responsibility, especially sony, but to no avail.
So now im trying to fix it myself. I took the phone apart, and the screen connector at the bottom was fried as expected. I bought a new screen and flex connector cable but still my screen wont show. The touchscreen works perfect, and so does the phone. When i connect it to my tv via MHL it works flawlessly. Every function including the new touchscreen works perfect, just that the screen is black on the device.
Am i missing something?? I really want to get this working so i can say IN YOUR FACE to this stupid company SONY. Im thinking the only thing it could be now is some faulty component on the mainboard regarding screen output, seems strange though that everything works perfect via MHL, especially the touchscreen.
Anybody have any ideas? Would be greatly appreciated if anyone can share similar experiences!
Cheers, Vincent from Sweden.
Click to expand...
Click to collapse
explain more about phone instead of situation and problem with service center
the touch panel is ok but display is died!
but the phone can boot with another display?!
Geeks Empire said:
explain more about phone instead of situation and problem with service center
the touch panel is ok but display is died!
but the phone can boot with another display?!
Click to expand...
Click to collapse
Hello.
The phone has booted ever since it got water damaged, even with the bad screen. Yes the touch panel works perfect but no display, and i can see and use everything on the phonebon my tv via mhl cable. I even updated firmware whilst using mhl to see if it would help but still no picture on the device.
I have replaced the touch screen and the flex ribbon cable that connects screen to mainboard. I have also removed mainboard and cleaned it with 95% alcohol incase some water or dirt causing a short circuit somewhere.
The mainboard looks fine, and everything works apart from the visual screen. Nothing is overheating. Im really baffled as to what could be wrong, but it surely must be something on the mainboard?
i
vinnibinni said:
Hello.
The phone has booted ever since it got water damaged, even with the bad screen. Yes the touch panel works perfect but no display, and i can see and use everything on the phonebon my tv via mhl cable. I even updated firmware whilst using mhl to see if it would help but still no picture on the device.
I have replaced the touch screen and the flex ribbon cable that connects screen to mainboard. I have also removed mainboard and cleaned it with 95% alcohol incase some water or dirt causing a short circuit somewhere.
The mainboard looks fine, and everything works apart from the visual screen. Nothing is overheating. Im really baffled as to what could be wrong, but it surely must be something on the mainboard?
Click to expand...
Click to collapse
I got same issue on Galaxy S4 but that wasn't water proof so this type of damage was normal for it.
have u tried ur display on another board?
- as Sony said it was user fault... after phone get wet have u tried to dry it with heat?
+ as i read the warranty agreements when u open phone by urself or others (non official center) it will void the warranty.
anyway If ur display not working with another board so thr is problem in display panel and not anything on board.
Please Inform me if u got any info or result of this damage
Thanks
:good:
Geeks Empire said:
I got same issue on Galaxy S4 but that wasn't water proof so this type of damage was normal for it.
have u tried ur display on another board?
- as Sony said it was user fault... after phone get wet have u tried to dry it with heat?
+ as i read the warranty agreements when u open phone by urself or others (non official center) it will void the warranty.
anyway If ur display not working with another board so thr is problem in display panel and not anything on board.
Please Inform me if u got any info or result of this damage
Thanks
:good:
Click to expand...
Click to collapse
Yes the phone is thoroughly dried out. I only opened the phone after i had received it back from sony service. They said it wasnt covered by warranty because it was water damaged and was caused by the user (even though both water indicators behind the 2 flaps are still white and not been exposed to water), and they said that they never repair water damaged phones.
Thats why i decided to open it and try to fix it myself, i had nothing (more) to lose!
I havent tried the new display on another board, thats exactly what i want to do but cant get hold of a new board. I've even been taking apart previous smartphones to see if the display can be connected to it somehow just so i can confirm it works. But the probability is that it does work, as the first "broken" screen worked in the same way as this one, touchscreen fine but no display. Thats why i changed the flex cable also, i thought it must be that when the mainboard seems to be doing everything else perfectly.
Does the problem have to be in one of those 3 components? Screen, flex cable, mainboard, or have i missed something?
Thanks
vinnibinni said:
Yes the phone is thoroughly dried out. I only opened the phone after i had received it back from sony service. They said it wasnt covered by warranty because it was water damaged and was caused by the user (even though both water indicators behind the 2 flaps are still white and not been exposed to water), and they said that they never repair water damaged phones.
Thats why i decided to open it and try to fix it myself, i had nothing (more) to lose!
I havent tried the new display on another board, thats exactly what i want to do but cant get hold of a new board. I've even been taking apart previous smartphones to see if the display can be connected to it somehow just so i can confirm it works. But the probability is that it does work, as the first "broken" screen worked in the same way as this one, touchscreen fine but no display. Thats why i changed the flex cable also, i thought it must be that when the mainboard seems to be doing everything else perfectly.
Does the problem have to be in one of those 3 components? Screen, flex cable, mainboard, or have i missed something?
Thanks
Click to expand...
Click to collapse
Yes, it should be those factors. From what you have stated, its most probably the connector on the main board. Before you make more purchases, try to take it to a shop and ask them to test the screen on another phone, so you can see if its the screen or not. It MIGHT be a faulty flex cable that you just purchased, hopefully, since its the cheaper solution. I actually bought one in ebay that was water damaged, changed the screen, middle frame and flex cable, and have a brand new refurbished Z2, good for me the main board was intact. I would take the board out, wash it with 95% alcohol again with a soft toothbrush to brush impurities off the connector piece. Then spray it a little with electrical spray and leave it in rice to thoroughly dry out overnight and try all the connections again. Look through the main board with a magnifying glass and see if anything obvious burned out, the smallest connection can cause problems.
If all fails, then take it to a shop to test the screen or the main board, hopefully they are friendly enough to do it.
Good luck buddy. :good:
elbello said:
Yes, it should be those factors. From what you have stated, its most probably the connector on the main board. Before you make more purchases, try to take it to a shop and ask them to test the screen on another phone, so you can see if its the screen or not. It MIGHT be a faulty flex cable that you just purchased, hopefully, since its the cheaper solution. I actually bought one in ebay that was water damaged, changed the screen, middle frame and flex cable, and have a brand new refurbished Z2, good for me the main board was intact. I would take the board out, wash it with 95% alcohol again with a soft toothbrush to brush impurities off the connector piece. Then spray it a little with electrical spray and leave it in rice to thoroughly dry out overnight and try all the connections again. Look through the main board with a magnifying glass and see if anything obvious burned out, the smallest connection can cause problems.
If all fails, then take it to a shop to test the screen or the main board, hopefully they are friendly enough to do it.
Good luck buddy. :good:
Click to expand...
Click to collapse
Sounds like good advice elbello
Good to know that you have managed to fix a water damaged Z2 using the same mainboard, hopefully i can have the same luck.
So you think it could be the flex cable? Are they known to break easily?
I have already cleaned the board twice with alcohol, maybe using electrical spray might help, and i will check it with a magnifying glass aswell.
Hopefully i can find a shop that will test the screen for me, but this is Sweden, the place where no favours are done, and where everything has to be sent away and fixed by professionals!
Thanks for the replys guys
I have just checked the whole mainboard with a magnifier, and found no oxidation anywhere. I found quite a bit of dirt in some places, and i have once again cleaned the screen connector with 95% alcohol and also the other side of the board behind the screen connector. I dont have any electrical spray at this time so cant test with that.
Another thing i have realised is that there is visual damage to two contact points that are located at the bottom of the phone, very close to where the flex cable connects to the lcd screen. What are these two contacts for, and could they be causing the problem? I will attach an image of them.
Thanks.
vinnibinni said:
I have just checked the whole mainboard with a magnifier, and found no oxidation anywhere. I found quite a bit of dirt in some places, and i have once again cleaned the screen connector with 95% alcohol and also the other side of the board behind the screen connector. I dont have any electrical spray at this time so cant test with that.
Another thing i have realised is that there is visual damage to two contact points that are located at the bottom of the phone, very close to where the flex cable connects to the lcd screen. What are these two contacts for, and could they be causing the problem? I will attach an image of them.
Thanks.
Click to expand...
Click to collapse
From that picture, I dont think that affects the screen at all. Bad thing is you cant try the two pieces you bought with another board so you can narrow the problem down.
I doubt the electrical spray will make wonders, it just good to clean dirt and make the contacts react better after oxidation, but if you state they are clean...
Think your only options is to consider it a loss, sell it in ebay for parts and stuff, or try getting a new flex and see if it was that, but if it wasnt, its like throwing money away. I would say the same for the screen, but those go for $100+ easily.
elbello said:
From that picture, I dont think that affects the screen at all. Bad thing is you cant try the two pieces you bought with another board so you can narrow the problem down.
I doubt the electrical spray will make wonders, it just good to clean dirt and make the contacts react better after oxidation, but if you state they are clean...
Think your only options is to consider it a loss, sell it in ebay for parts and stuff, or try getting a new flex and see if it was that, but if it wasnt, its like throwing money away. I would say the same for the screen, but those go for $100+ easily.
Click to expand...
Click to collapse
Yea i was thinking about selling it for parts, but its not really worth much without a working mainboard. I will probably just keep it and wait till i can get hold of a new board. How much do you think a new board would cost? I cant find one anywhere at the moment when searching on ebay/google.
Wish i had access to a working board for testing
Hello,
I have the same problem ... black screen on the tv works perfectly, xperia z2 also drowned after 10 seconds under water .... someone back to life solved the screen, that you have replaced?
best regard.
Oscar
vinnibinni said:
Yea i was thinking about selling it for parts, but its not really worth much without a working mainboard. I will probably just keep it and wait till i can get hold of a new board. How much do you think a new board would cost? I cant find one anywhere at the moment when searching on ebay/google.
Wish i had access to a working board for testing
Click to expand...
Click to collapse
Hello ..... no answer .....
I'll buy on aliexpress touch screen digitizer to replace it, anyone know if the screen will return to work? I have to replace more parts? thank you ...
Best Regard
Oscarrrr
Hello,
I'm now in the exact same position.
Water damaged, Touchscreen is still working I can enter recovery any press stuff but no display only shows black.
Had my screen replaced in a shop here but same problem prevails.
They told me to replace Mainboard 3500 THB.
But they didnt have one right then.
He could fix it?
vinnibinni said:
Yea i was thinking about selling it for parts, but its not really worth much without a working mainboard. I will probably just keep it and wait till i can get hold of a new board. How much do you think a new board would cost? I cant find one anywhere at the moment when searching on ebay/google.
Wish i had access to a working board for testing
Click to expand...
Click to collapse
he could you solve your problem? It happens to me the same with a z2 . I board bought new eh and the problem persists . you could help me?
Thinking of buying a used z2 with intermittent touchscreen issues. It works but seems to be intermittent it either takes multiple taps to work or it goes mad like your pressing the keys could this be down to water damage or possibly just a software issue and need re-flashing a ftf by clean install it's a totally stock z2 in mint condition for £50
[email protected] said:
Thinking of buying a used z2 with intermittent touchscreen issues. It works but seems to be intermittent it either takes multiple taps to work or it goes mad like your pressing the keys could this be down to water damage or possibly just a software issue and need re-flashing a ftf by clean install it's a totally stock z2 in mint condition for £50
Click to expand...
Click to collapse
It's probably hardware problem. Trust me, ghost touches make people go crazy,so don't buy it.
Sent from Xperia Z2
Luckily not from an iPhone = Yesterdays technology at tomorrows prices
Ghost touches are a digitizer problem right?
You can buy a new one for about 30-50$
Gesendet von meinem LENNY2 mit Tapatalk
Haldi4803 said:
Ghost touches are a digitizer problem right?
You can buy a new one for about 30-50$
Gesendet von meinem LENNY2 mit Tapatalk
Click to expand...
Click to collapse
Probably yes, but replacing it isn't so easy these days.
Sent from Xperia Z2
Luckily not from an iPhone = Yesterdays technology at tomorrows prices
try this : http://www.mobilerdx.com/2014/10/sony-xperia-z2-display-light-working-problem-solution.html
or this : http://gsm-friends.blogspot.co.id/2015/05/sony-xperia-z2-display-light-ic.html

No signal issue (still no solution :()

Hello,
i just got my Z2 and well i have drm fix xposed and some mods installed and one time i just held device and violaa no signal on it, on lockscreen it shows No Service and there empty signal bar, but there`s IMEI present and untouched so no IMEI problem...
i tried Reflash stock rom LP and KK too with flashtools but still no success... so what a heck to do?
P.S of course i searched everything in Google but i got nothing, still could not find any solution
Prerevision said:
Hello,
i just got my Z2 and well i have drm fix xposed and some mods installed and one time i just held device and violaa no signal on it, on lockscreen it shows No Service and there empty signal bar, but there`s IMEI present and untouched so no IMEI problem...
i tried Reflash stock rom LP and KK too with flashtools but still no success... so what a heck to do?
P.S of course i searched everything in Google but i got nothing, still could not find any solution
Click to expand...
Click to collapse
Strange issue... Does your Z2 ask you for a PIN code when you turn it on or not?
Bruce666 said:
Strange issue... Does your Z2 ask you for a PIN code when you turn it on or not?
Click to expand...
Click to collapse
no, by they way its 03 LTE version bought in store so it cant be simlocked, also in some locations it has signal but manly it don`t
heyy anyone pleasee?
Prerevision said:
no, by they way its 03 LTE version bought in store so it cant be simlocked, also in some locations it has signal but manly it don`t
Click to expand...
Click to collapse
"also in some locations it has signal but manly it don`t" --> unfortunately this feels like an hardware problem, defective or disconnected antenna or something like that.
If it was software related flashing the stock rom should have fixed it...
Have you tried another sim card on your phone? maybe a defective sim card could be the cause too and you can test that easily. if it's also not sim card related i would send it to sony if i still had warranty.
If i was out of warranty i would open the phone (buy new adhesives before you do this, i don't think you can reuse the original) and check the coax antenna cable. I never opened my z2 but it doesn't look that hard.
https://www.ifixit.com/Guide/Sony+Xperia+Z2+Logic+Board+Replacement/34646
on step 6 you can see the coaxial antenna highlighted in the blue circle, it looks like a pigtail connects it to the motherboard i would check that first.
ptmaniac said:
"also in some locations it has signal but manly it don`t" --> unfortunately this feels like an hardware problem, defective or disconnected antenna or something like that.
If it was software related flashing the stock rom should have fixed it...
Have you tried another sim card on your phone? maybe a defective sim card could be the cause too and you can test that easily. if it's also not sim card related i would send it to sony if i still had warranty.
If i was out of warranty i would open the phone (buy new adhesives before you do this, i don't think you can reuse the original) and check the coax antenna cable. I never opened my z2 but it doesn't look that hard.
https://www.ifixit.com/Guide/Sony+Xperia+Z2+Logic+Board+Replacement/34646
on step 6 you can see the coaxial antenna highlighted in the blue circle, it looks like a pigtail connects it to the motherboard i would check that first.
Click to expand...
Click to collapse
tried another sim, it`s same but hardware? it worked just fine but once.... ehm well it`s already open iv got water damage while put it in water but one who fixed it said there was no damage but only screen led lights also it just got wrong while i was HOLDING device in hands there was no drop or something
Prerevision said:
tried another sim, it`s same but hardware? it worked just fine but once.... ehm well it`s already open iv got water damage while put it in water but one who fixed it said there was no damage but only screen led lights also it just got wrong while i was HOLDING device in hands there was no drop or something
Click to expand...
Click to collapse
I'm not an hardware expert but if it's not the sim and you're seeing some water damage inside the phone that's probably the cause. you might have water residue or oxidation on the antenna connectors which will make your signal weak. you can buy a new antenna online cheap and replacing it looks very easy. after a quick search i found this: http://www.witrigs.com/antenna-rf-cable-for-sony-xperia-z2
I really like my z2 and i would try everything that was not too expensive/hard to fix it
ptmaniac said:
I'm not an hardware expert but if it's not the sim and you're seeing some water damage inside the phone that's probably the cause. you might have water residue or oxidation on the antenna connectors which will make your signal weak. you can buy a new antenna online cheap and replacing it looks very easy. after a quick search i found this: http://www.witrigs.com/antenna-rf-cable-for-sony-xperia-z2
I really like my z2 and i would try everything that was not too expensive/hard to fix it
Click to expand...
Click to collapse
man i`ll learn a lesson and never will buy Sony anymore or any "water resistant" phone
by the way after water damage fix it worked fine about 2 week then got signal issue

Wifi signal problem,very weak

Hi experts and xperia users.
I went thru this forum and looked for the same subjected question but had no luck.
Pls advise me how to resolve my wifi problem. I stood very close to a hotel access point and my m4 only discover 2 bars of signal,compare to my xi***I it got full bars. Wifi analyzer said 30db but m4 only 50 something
I tried move to another space in my home and school, restaurant with various AP brands my m4 still got bad signal,even the M4 placed very close with AP.
Pls don't tell me to make static IP, or change AP configuration.
Pls help.
Maybe your m4 has problem scanning wifi.
You really need expert to help you out.
Sent from my E2363 using Tapatalk
mfpss95134 said:
Maybe your m4 has problem scanning wifi.
You really need expert to help you out.
Sent from my E2363 using Tapatalk
Click to expand...
Click to collapse
I do need it but not sending my phone to sony service center local support, extremely worst suppot.
rest factory your phone, Go to Settings >WIFI >advanced wifi > set WIFI frequency band in 2.4 GHz only... or just 5GHz.
roxandn said:
rest factory your phone, Go to Settings >WIFI >advanced wifi > set WIFI frequency band in 2.4 GHz only... or just 5GHz.
Click to expand...
Click to collapse
I did, still persists.
Is it hardware issue?
xmbohx said:
I did, still persists.
Is it hardware issue?
Click to expand...
Click to collapse
Probably... I had exactly the same issue... veeeeery poor signal.
On rear(left-up side) are two plates, which conecting to wifi antena. I think that are disconnected. I resolve this by replacing rear cover.
//sorry for my eng.
outofmemory13 said:
Probably... I had exactly the same issue... veeeeery poor signal.
On rear(left-up side) are two plates, which conecting to wifi antena. I think that are disconnected. I resolve this by replacing rear cover.
//sorry for my eng.
Click to expand...
Click to collapse
Thanks for ur reply. I attach my m4 picture from back side.
CMMIW, where are two plates you mean, @outofmemory13 ?
And you did replaced the whole back side cover?
xmbohx said:
Thanks for ur reply. I attach my m4 picture from back side.
CMMIW, where are two plates you mean, @outofmemory13 ?
And you did replaced the whole back side cover?
Click to expand...
Click to collapse
I meant:
imgur.com/SQf4aYD
After replacing rear(back) cover Wifi works perfect. btw. I've bought black cover(my M4 is white) - looks awesome
imgur.com/VU6OHuT
I tried to repair this w/o replacing - Yeah, it worked, signal is better, but still poor. Cleaning the plates gives no results. Idk why.
It's not hard. After replace m4 is still waterproof (tested).
outofmemory13 said:
I meant:
imgur.com/SQf4aYD
After replacing rear(back) cover Wifi works perfect. btw. I've bought black cover(my M4 is white) - looks awesome
imgur.com/VU6OHuT
I tried to repair this w/o replacing - Yeah, it worked, signal is better, but still poor. Cleaning the plates gives no results. Idk why.
It's not hard. After replace m4 is still waterproof (tested).
Click to expand...
Click to collapse
I cant open your image, anyway i sent you PM.
Deleted
@outofmemory13 finally i am able to open ur image. However it is not clear enaugh for me,sorry. So:
1. Is it located at top left of the back side?
2. You replaced the back cover and wifi signal work better?
Exactly.
on the back cover there's black sticker - this is NFC antena shared with Wi-Fi.
w/o antena the wifi works... just like IrDa in old phone So... That's why I'm think, that is problem with connection between cover and main PCB.
The antena maybe is damaged by default. Also I forget to mention that the antena maybe doesn't adhere into cover(check this by pressing this place* with little pressure - if signal is better - let me know)
*top left > 1cm down.
It does not work for me, even I take off the rear case (without case) no improvement, still weak.
xmbohx said:
It does not work for me, even I take off the rear case (without case) no improvement, still weak.
Click to expand...
Click to collapse
Yeah, without the rear case it'll works like this.... even worse.
1. use a multimeter to check that two copper plates have around 0 resistance.
2. It can be weird, but try add some tinfoil(into the plates) to improve connection between cover and pcb. Carefully. And check again.
If doesn't work - it's a problem with Wi-Fi sensor. Unrepairable.
I've fixed 3 M4 with the same problem so far. Can't belive, that in this case all my instructions aren't working, maybe there's another issue, I guess... Anyway, check it and show the result.
#I don't like English... case, case... the same words and another meaning...
I have no luck on this and plan so sell the phone thank you all for the advices.

Touch screen freeze

The new touchscreen works well without a simcard, but when i put the simcard on the socket it simply become unresponsive! any help on this? Please give guidelines to resolve this issue
Model Moto e 2 gen
vickywiki said:
The new touchscreen works well without a simcard, but when i put the simcard on the socket it simply become unresponsive! any help on this? Please give guidelines to resolve this issue
Model Moto e 2 gen
Click to expand...
Click to collapse
Is there any chance of a short circuit, loose screw or loose connection, any source electrical interference?
unclesado said:
Is there any chance of a short circuit, loose screw or loose connection, any source electrical interference?
Click to expand...
Click to collapse
No loose connection there is one strap which is connect display to board it is perfect. If it is loose connection mean it should also not work at without sim but it works fine
vickywiki said:
No loose connection there is one strap which is connect display to board it is perfect. If it is loose connection mean it should also not work at without sim but it works fine
Click to expand...
Click to collapse
Assuming, everything is ok with the screen, Sim card is still partially conductor. If something misplaced, it can interfere easily.
unclesado said:
Assuming, everything is ok with the screen, Sim card is still partially conductor. If something misplaced, it can interfere easily.
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How to solve this issue
vickywiki said:
How to solve this issue
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I checked a screen replacement guide, screen and touch digitizer plug and play, so they supposed to work when it's replaced properly.
Things you can do without opening the device that I found on internet,
- There is a suggestion to remove if case or a screen protector and I don't think it's relevant.
- Any other suggestion on the internet is knocking the corners of the screen.
- Getting kernel log and android log is another option. There might be something crashing.
- If you didn't reset the device already, you could try to reset it to see if it works.
Then there is no easy fix. You need to disassemble the device, check if there is wrong connection, dust, anything shouldn't be there. If you can find you can try spare screen. If there is no problem you should check components for faulty responses, voltage levels, etc.

LG V60 ThinkQ Dual screen problems?

I hopped on the T-MO B1G1 deal with my brother and after a week of trying things out, we noticed every now and then our dual screen (when both screens are active) the left one glitches. Does anyone have that problem? See picture attachment for an idea. In a nutshell, this only happens when I have both screens active and multi-tasking at times where the left screen will get a glitchy lighting error.
The glitch is either a quick shut off and turn on with the left screen or it quickly changes the left screen to be bright and colorful as shown in the picture.
If anyone ran into this problem and know how to fix it, please share it! My brother's LG v60 doesn't get this dual-screen glitch as often, only once or twice for him while I'm getting it almost everyday. I'm hoping to avoid another format, I'm wondering if it's an app or setting that is not compatible with dual screen.
Thanks
*Looks like I can't post a picture yet until I get more posts in.*
Your unit is defected. Contact t-mobile for a replacement. There are videos on youtube of a few users with the same experience.
I myself haven't had issues, I've had it for a week now
Had mine since march 25th and no issues either.
Here is the video on youtube about one reviewer with a 2nd display issue
rkingsparx81 said:
Had mine since march 25th and no issues either.
Here is the video on youtube about one reviewer with a 2nd display issue
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Thanks for all the replies! It happened to my bro's LG V60 today again and so we are pretty sure both of our dual screen is defected.
I'll try with LG Promise warranty to see if I can get a replacement dual screen first, hopefully they can take care of it faster than T-Mobile. T-mobile has been giving me ****ty customer service lately, so hopefully LG can make it right.
Thanks all.
Now normally TMobile will overnight a device if you have insurance. If you don't have insurance it's a 3-5 day wait for a replacement
Wide-mode app part of this?
I ran into this with my AT&T velvet. LG replaced it and it's been working for the past week.
Question: Did you install the wide-mode for LG app? I was wondering if that might have done something to some bit of memory somewhere. It didn't claim to support the Velvet but I tried it anyway. I don't remember if that's when it started acting up. I factory-reset the phone to see if that helped but the problem kept re-occurring. I emailed the app's author but got no reply.
I figured I'd ask. I'd like to re-install the app but don't want to possibly mess things up.
Thanks,
Frank
I got the phone over the weekend and mines glitches often i when back to t mobile and they replaced my dual screen and yet again with in a hour it still glitching
try a little tape/padding between the phone bottom port and the case usb plug, its probably a connection problem, poor design, im unable to return mine so this worked great for me.
dual Screen bad connection, maybe solved with wedge?
My dual screen case has been playing up, about 90% of the time i clip on the case the screen does not work after a few minutes due to movement. it seems LG has made a bad design with the usb c connection and poga style pins at the bottom of...
forum.xda-developers.com
gary776677 said:
try a little tape/padding between the phone bottom port and the case usb plug, its probably a connection problem, poor design, im unable to return mine so this worked great for me.
dual Screen bad connection, maybe solved with wedge?
My dual screen case has been playing up, about 90% of the time i clip on the case the screen does not work after a few minutes due to movement. it seems LG has made a bad design with the usb c connection and poga style pins at the bottom of...
forum.xda-developers.com
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Click to collapse
I had to have my dual screen replaced. The screen would just turn green and fade out. Lg sent it in less than a week. There's no reason to resort to things like tape or stuff. All V60s are still under warranty. Just send the screen part back to lg and they will replace it.
pflatlyne said:
.... All V60s are still under warranty. Just send the screen part back to lg and they will replace it.
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not sure if you have travelled much, but LG warranty isn't worldwide... i cant get back to the usa any time soon, plus im getting free top quality healthcare where i am, so gonna use it as long as i can.
gary776677 said:
try a little tape/padding between the phone bottom port and the case usb plug, its probably a connection problem, poor design, im unable to return mine so this worked great for me.
Click to expand...
Click to collapse
I'm in the same boat, and used the same solution. I have a thin metal disc that mates with a magnet to use as a stand, mount the phone, etc. (IM Stick). Installing that disc at the very bottom of the case gave the USB C connector just what it needed to mate correctly. Bonus: No interference with wireless charging!

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