hi,
I'm thoroughly baffled here .... can anyone help please ? ... it's a long post I'm afraid, since I want to include all the info I can.
recently my beloved Legend suddenly decided it has no signal .. I get 'limited service' and the dreaded red 'X' all the time.
prior to this I had done no changes to phone nor had back cover off or taken the sim out. I have upgraded it to Blayos rom and all has been fine.
after some searching I discovered all the advice re bad antenna and a so called fix by shorting some terminals with a piece of wire.
(exactly which terminals was not made too clear though)
I am not sure though that I actually do have a bad antenna as I have cleaned the 2 under the bottom cover and 'lifted' the mating contacts ...
and have done the same with those under the camera cover.
one other thing I did was to circuit test all the 6 contacts in my phone, and they all 'ring out' ok ...
indeed they all ring out to each other, even with covers off, which suggests to me that there is a good circuit in the phone
still no service, but my GPS gets a lock pretty quickly, does it use the same antenna setup ? ...
I'm not even sure if it does really as I have read that phone will not work with bottom cover off, yet my GPS certainly does !
lastly I doubt it is the sim as it works fine in my wife's phone, but her's does not in mine.
over 190 viewings and no suggestions ...anyone please ?
in desperation I have changed my Radio from 7.13.35.05 to 7.13.35. 13 and got no improvement
Last act of desperation would be returning to stock...
If your not on airplane mode all the time I doubt this is a software issue.
Sent from my HTC Legend using xda premium
Related
I have a HERM200 (TYTN HTC Branded). I definately have a hardware error that seems to be related to motherboard pressure. Totally took the phone apart - cleaned everything and reseated connections. I initially did have problems flashing a radio/OS Rom due to NO GSM errors - but I did get a complete working flash. For a week the phone has been sitting on my desk without a SIM card on standby. Power cycled it a few times and the radio will always come on. Can turn the radio on and off with flight mode. Always comes back. Turned on WIFI and Bluetooth no problems. Do have a Dpad problem where the direction button will stop working unless I move the scroll wheel. Other than that it doesn't freeze even under load and don't have white screens or no return from standby. So doesn't seem to be heat related - ie processor heat.
OK, put a sim card that works fine in a 2125 and I can make and receive calls. Did it for many calls last night - received and made the calls. Send text messages. Opened the slider several times. No problems. Battery was down so I charged it though a USB connection. Got the battery up to about 50% Still can make and receive calls doesn't seem to "hunt" for a signal which the phone would do if the radio was failing.
Removed the SIM card this morning and put the battery back in - received the first NO GSM after about a week. Removed the battery and touched the metal plate behind the battery and the GSM came back on bootup. The case screws are snug not super tight.
Is is possible that the motherboard is either faulty - removing the SIM caused it to flex or touching the battery back plate flexed or reconnected some chip.
IMHO the battery plate backer is WAY too close to the motherboard and is either putting undue pressure on the motherboard chips or when the battery is charging it somehow expands slightly causing pressure points. Seems like the battery backer plate is sitting directly on the chipsets.
Any thoughts - seems like there are way too many NO GSM errors for this phone.
same problem here probably
Same problem here... I've tried to flash the radio, but it stucks after a while..
Please help me, my Dopod 838 Pro has No GSM!
There is probably little you can do. Either the chip on the motherboard is fried or you did a bad flash. Explain the situation - did it just happen or did you flash something and it went bad. If it "just" went bad the radio is more than likely defective and no amount of software fixes will correct it. You will need another motherboard or a new phone. There are tons of articles about no GSM errors and sometimes it will come back but not for long. Known problem with this phone unfortunately.
I am seeing random/frequent/constant loss of signal on my S2 even while sitting on my office desk for hours. Either I have to reboot or have to switch on and off the airplane mode to bring the signals back.
I dropped this phone in water on last friday and once it was dried up it was working totally fine. At that time I was using Chameleon ROM(4.1.2), Dori Kernel 8.43.v76 and MS4 radio. I flashed XXLS8 modem/radio as I had seen good results on this modem. On Monday I flashed Sentinel ROM v4.6 (4.2.2), stock kernel and I have started facing the signal drops. Blaming it to the modem, I flashed another one XXLS6 (about which I have read good reviews for my location) and I was still getting signla drops. I had been on Sentinel ROM couple of times and never faced such issue. Still, blaming it on ROM, I flashed AOSB Kitkat (another fav of mine) today and I am still getting the signal drops.
I am unable to pinpoint the source of this issue and cant keep on flashing modems when I actually know that XXLS8 and XXLS6 are really good ones for me.
A search on xda led me to this link http://forum.xda-developers.com/showthread.php?t=2739573 which suggests deleting CellBroadcastReceiver.apk from /system/app. Tried even that, but didnt work out.
I am ruling out the waterboarding as a cause because I saw it working perfectly for 2 days after it was dried up.
Any help/suggestion/information is appreciated.
EDIT: I thought it was solved as it didnt appear for few hours. But since last night its back and its kinda frequent. It displays blank triangle in this case. recently it has also started showing full signal (emergency calls only and without 2g/3g signals) and i am unable to receive or make calls.
:BUMP:
Now there are no signals at all. Am getting desperate. Flashed stock rom again to no avail. Tried Different kernels/roms but no success. Anything?
You sound like you have been very thorough in what you have tried....
The fact that you have flashed different ROMs/kernels/modems without any change kinda rules out a software issue. I'm afraid (from what I've read) you ARE facing a hardware issue. Water penetration will cause a whole collection of issues that may/may not appear immediately. It will cause corrosion......and corrosion is a gradual process......so a part of the phone that *may* have appeared unaffected, may well work for a time before it actually fails......
My wife says I'm a phone geek....She's probably right
keithross39 said:
You sound like you have been very thorough in what you have tried....
The fact that you have flashed different ROMs/kernels/modems without any change kinda rules out a software issue. I'm afraid (from what I've read) you ARE facing a hardware issue. Water penetration will cause a whole collection of issues that may/may not appear immediately. It will cause corrosion......and corrosion is a gradual process......so a part of the phone that *may* have appeared unaffected, may well work for a time before it actually fails......
My wife says I'm a phone geek....She's probably right
Click to expand...
Click to collapse
Thanks for replying. Finally a senior member looked at this thread
I agree that corrosion, being gradual process, can screw up a lot of things but its kinda indigestible for me that in one week its condition will be deteriorated to this level. anyways, if i visit a service center, what parts I might get changed for this? I know you havent seen my phone from inside, and you cant say anything at a concrete level but just want to know that someone with this kinda problem is looking at what kinda parts to be changed and what kinda bill?
The components on these boards are in general, tiny.....and their connectors are even smaller.....so corrosion at this pace is entirely possible.
The symptoms tally with this too....increasing corrosion = worsening performance.
It's either going to be really good news......or it's going to be chuck the phone away and start again news.
There is a white connecting cable in the phone that carries the network signal from the antenna to the main board.....
The cost depends where the fault is......
If the fault is on the board housing the antenna, it's pocket change....
If it's the mainboard side.......
The good news is that both of these boards can be independently sourced and easily DIY replaced.
The problem with micro electronics is that it is virtually impossible to replace individual components on a given board....and any authorised repairer won't even consider it....they'll just replace the entire board.
My wife says I'm a phone geek....She's probably right
---------- Post added at 06:54 PM ---------- Previous post was at 06:46 PM ----------
Take a look at this thread.....
http://forum.xda-developers.com/showthread.php?t=2335961
there's a video linked in it which will give you an idea of what you're looking at if you decide to DIY it....
You will also find links to part suppliers.
My wife says I'm a phone geek....She's probably right
keithross39 said:
The components on these boards are in general, tiny.....and their connectors are even smaller.....so corrosion at this pace is entirely possible.
The symptoms tally with this too....increasing corrosion = worsening performance.
It's either going to be really good news......or it's going to be chuck the phone away and start again news.
There is a white connecting cable in the phone that carries the network signal from the antenna to the main board.....
The cost depends where the fault is......
If the fault is on the board housing the antenna, it's pocket change....
If it's the mainboard side.......
The good news is that both of these boards can be independently sourced and easily DIY replaced.
The problem with micro electronics is that it is virtually impossible to replace individual components on a given board....and any authorised repairer won't even consider it....they'll just replace the entire board.
My wife says I'm a phone geek....She's probably right
---------- Post added at 06:54 PM ---------- Previous post was at 06:46 PM ----------
Take a look at this thread.....
http://forum.xda-developers.com/showthread.php?t=2335961
there's a video linked in it which will give you an idea of what you're looking at if you decide to DIY it....
You will also find links to part suppliers.
My wife says I'm a phone geek....She's probably right
Click to expand...
Click to collapse
Many many thanks. DIY won't bug me, i have steady hands
But how would i know which components are faulty?
Ha....that's the million dollar question ain't it......
Having viewed that video I linked to, to refresh my memory, there are 3 modules that potentially could be giving you issues......
Antenna/speaker module
USB port module
Mainboard
It's going to be a case of replacing each one, one at a time, until the issue resolves itself. The first two are the cheaper side of things, and are where my gut instinct says the problem lies......
Sorry mate...it's the only way without taking it to a service centre.
My wife says I'm a phone geek....She's probably right
Your link talks about changing the usb port. There i read that it hosts aerial connector too. Is it the part responsible for receiving signals or is it antenna module?
Btw, awesome guide you got there.:good:
Meanwhile i flashed stock rom again and after ten minutes of booting it finally got signals. I dont know for how long its gonna stay but i m glad that it saw signals after 2 days of struggle.
The speaker module houses the actual antenna. It has a couple of sprung connectors which press on corresponding plates on the USB module. Some people have said that modifying the USB board has had an effect on the signal strength.
The speaker / antenna module is the cheapest part to replace....best to start there......
My wife says I'm a phone geek....She's probably right
Thanks a lot. I really appreciate it.
This whole fiasco was a great learning for me. Lost imei and baseband on my way and recovered them too. And looks like it will end in me performing a DIY on my phone.
For now the signals are stable for more than 12 hours which is like the most I have seen since 3 days. I will see if I can utilize your guide this weekend.
Thanks again for your help and time.
Can loosing imei/baseband be the cause of loosing connectivity?
EDIT 1: And my troubles are far from over. It still needs to be switched to aeroplane mode and switch it off to get the connectivity back or a reboot is required. The worst problem is that now the signal shows full in the status bar but with "No connectivity" or "Emergency calls only" which is even worse to handle.
Looks like it can connect to the network provider normally but cant hold the connection for long and requires a reset. Will changing USB port help in this kind of case?
EDIT 2: After a whole day of being on stock and switching the phone into aeroplane mode again and again, I thought of giving custom roms another try. On a KK ROM and on another JB ROM (4.1.2) it was a total struggle to even connect to a network. Tried various modes - wcdma, gsm, auto but nothing worked. Tried different modems too but it just ended up in making the phone really hot. Experimented so much that even when the sim was in, i got the message - "insert sim card to access network". Back to stock rom now.
I don't know whether there is any circuitry inside the speaker / antenna module that will cause issues with signal.....the fact that some people say that modifying the USB board affects signal leads me to think that there probably isn't and that it's all housed on the USB board........
And I'd advise that you back up your IMEI and EFS folder while it is intact.....before you attempt to flash anything else.....
A good app for this is ktool on the play store.......
https://play.google.com/store/apps/details?id=net.hellcat.droiddev.ktool
My wife says I'm a phone geek....She's probably right
Backed up everything a long time back itself when I saw myself become flash maniac. thanks for the advice though.
I checked up USB port on eBay and it is not available in my country. From US shipping and all makes it unaffordable . Will be visiting a service center today or tomorrow.
Eventually Waterboarding was the culprit. Got a call from service center today that they found waterlogging on mainboard. Getting it replaced now.
Heavy on pockets but still cheaper than an equally capable new phone.
Thanks keithross39 for all the help. Appreciate it.
No problem fella......just be prepared for other issues too (might never happen.....but......)
If the water damaged the main board, other boards might have been affected too......
My wife says I'm a phone geek....She's probably right
I was starting to feel relieved after knowing mainboard issue, but here you are, scaring me more
Alright, I will keep an eye on the day to day activities of my phone for few days once its back. I just hope it comes out alive.
Lol...just mentioning the "worst case scenario*......but on the bright side, every other board in the phone costs pocket change.......
My wife says I'm a phone geek....She's probably right
Asked the service center guys and they say everything is fine with other components. Looks like they are not interested in my pocket change
One last question, does changing the mainboard changes your imei number?
An authorised service centre should be able to re write your IMEI....but under normal circumstances it will change.....
My wife says I'm a phone geek....She's probably right
Hi,
I've been having a somewhat mysterious problem with the wireless internet (Wi-Fi) signal on my SCH-1545, hopefully someone here can help me find a solution.
Details:
At rest, my wi-fi signal is weak, regardless of which network or router is producing the signal.
I use an oversized Anker 7800mAh battery, which adds a considerable amount of weight and bulk to my GS4.
I am currently running a recent snapshot release of Cyanogenmod (11-20140804-SNAPSHOT-M9-jflte). The last time I updated was few weeks ago, but my wifi issue began sometime early this week. Thus, it seems unlikely that the ROM is to blame. For what it's worth, my baseband version is 1545VRUAMDK.
Oddly, after some poking around, I've discovered that applying pressure to the back of the phone near the lock button seems to increase the quality of my wifi connection. For example, at rest right now my phone shows a 30% signal; when squeezed in the aforementioned manner, the signal jump s immediately to 55-60%.
I suspect that there may be some fault with the wifi antenna connector, or with the antenna itself.
My best theory right now is that a mishap or fall with this bulky battery installed may have delivered a shock to the phone's hardware beyond what it is designed to withstand. Consequently, it seems that the wifi system was somehow compromised. I've tried cleaning the wifi contacts as suggested here[1] .
Has anyone had this problem? Can anyone offer a solution?
I can't go on using my phone like this, and to get a replacement will be quite costly. However, if I do end up getting a replacement, I have my eyes on a LG G3
Thanks for your help!
aberen03 said:
Hi,
I've been having a somewhat mysterious problem with the wireless internet (Wi-Fi) signal on my SCH-1545, hopefully someone here can help me find a solution.
Details:
At rest, my wi-fi signal is weak, regardless of which network or router is producing the signal.
I use an oversized Anker 7800mAh battery, which adds a considerable amount of weight and bulk to my GS4.
I am currently running a recent snapshot release of Cyanogenmod (11-20140804-SNAPSHOT-M9-jflte). The last time I updated was few weeks ago, but my wifi issue began sometime early this week. Thus, it seems unlikely that the ROM is to blame. For what it's worth, my baseband version is 1545VRUAMDK.
Oddly, after some poking around, I've discovered that applying pressure to the back of the phone near the lock button seems to increase the quality of my wifi connection. For example, at rest right now my phone shows a 30% signal; when squeezed in the aforementioned manner, the signal jump s immediately to 55-60%.
I suspect that there may be some fault with the wifi antenna connector, or with the antenna itself.
My best theory right now is that a mishap or fall with this bulky battery installed may have delivered a shock to the phone's hardware beyond what it is designed to withstand. Consequently, it seems that the wifi system was somehow compromised. I've tried cleaning the wifi contacts as suggested here[1] .
Has anyone had this problem? Can anyone offer a solution?
I can't go on using my phone like this, and to get a replacement will be quite costly. However, if I do end up getting a replacement, I have my eyes on a LG G3
Thanks for your help!
Click to expand...
Click to collapse
Have your tried doing a factory reset? I know this is a pain in the butt but maybe it will put your mind at ease. Have you dropped the phone or anything that would cause the antenna to suddenly become loose? Is your connection bouncing up and down or is it consistenly just staying low? Also before a factory reset try getting Wifi Analyzer from the app store and check to see whats going on. Just sounds rather buggy that it suddenly started happening.
Same thing been happening to mine just recently. Seems like when I squeeze the battery cover the wifi signal is stronger for a limited amount of time.
Sent from my GT-I9505 using XDA Premium 4 mobile app
If you squeeze your phone and it affects signals take off battery cover and try tightning all the little screws around the phone with the battery out.. might help just saying
Thanks for your suggestions folks, but I still seem to be in a pickle.
SUPERSPORT25 said:
Have your tried doing a factory reset? I know this is a pain in the butt but maybe it will put your mind at ease. Have you dropped the phone or anything that would cause the antenna to suddenly become loose? Is your connection bouncing up and down or is it consistenly just staying low? Also before a factory reset try getting Wifi Analyzer from the app store and check to see whats going on. Just sounds rather buggy that it suddenly started happening.
Click to expand...
Click to collapse
I tried a factory reset, didn't seem to help according to Wifi Analyzer (thanks for the app suggestion). As I said in my original post, I fear that drop may have caused this problem: since I use a heavy extended battery, I expect the damage caused by any fall would be magnified.
FordNate said:
If you squeeze your phone and it affects signals take off battery cover and try tightning all the little screws around the phone with the battery out.. might help just saying
Click to expand...
Click to collapse
I attempted this as well - I removed the back cover and ensured all the ribbon cables and antenna cables were making a firm connection, and then I tightened all the cover screws. Nothing seems to have helped. Concurrent with my previous statement, I fear one of the modules (specifically the wifi/bluetooth SIC) on the motherboard may have become slightly dislodged from a random fall.
Does anyone know of a way I can test this theory or get it fixed if such is the case?
aberen03 said:
Thanks for your suggestions folks, but I still seem to be in a pickle.
I tried a factory reset, didn't seem to help according to Wifi Analyzer (thanks for the app suggestion). As I said in my original post, I fear that drop may have caused this problem: since I use a heavy extended battery, I expect the damage caused by any fall would be magnified.
I attempted this as well - I removed the back cover and ensured all the ribbon cables and antenna cables were making a firm connection, and then I tightened all the cover screws. Nothing seems to have helped. Concurrent with my previous statement, I fear one of the modules (specifically the wifi/bluetooth SIC) on the motherboard may have become slightly dislodged from a random fall.
Does anyone know of a way I can test this theory or get it fixed if such is the case?
Click to expand...
Click to collapse
i'm in the same boat, my phone is exeriencing the exact same issue. I've got a new back plate on order, hopefully replacing that and the wifi/bluetooth antenna will resolve it.
have you had any success since this post?
My 2nd post with this accound but ive been a member for qutie a while but was inactive for a few years and cant recover my account.
Anyhow i bought a Timmy E86 . Its pretty cheap but pretty good apart from the GPS
It has the mediatek 6582 chip.
Ive been through just about every mediatek gps fix.
EPO Downloads
AGPS servers
MTK Engineering mode
FasterGps
er
When i got the phone GPS signal was non existant. even after using many different gps fix apps.
I then discoverd that without the cover on and the antenna peeled back i managed to get signal, put cover back on and signal goes. So the cover is blocking signal.
I extended the antenna with a make shift foil antenna, which improved the signal slightly and allowed signal with the cover on. Great thinking its fixed, however navigation was terrible, loosing signal and the heading facing wrong way.
Then it lost all signal again after a restart and woukldnt get signal again randomly until smoe while later. Satilites show but zero signal.
The antenna is rubbish on this phone,
I know this is probably the main source of the problem, i plan on remove the case cleaning the contacts and installing a better antenna, either made of copper tape or perhaps something else.
But im pretty sure theres something else wrong deeper down in the software.
I done some further testing yesterday managed to get gps signal and 3d fix. Since i was being a passanger rather than driver i could see what was gong on. as soon as we started moving the satilite signals would drop to 0.....
ni thoughts?
bazsound said:
ni thoughts?
Click to expand...
Click to collapse
Finally tracked the issue down to really poor GPS antenna.
Remoived it, replaced it with bare copper wire from a power cord , made sure it was well twisted so all the strands were together and neat.
Used the end of the GPS antanna that contacted the board and soldered it to the the pad of the old gps antanne end, so that when the case went back in it contacted the board pin.
Success. GPS lock indoors at a window and still picking up satilites away from window but not enough for lock.
Until i screwed everything back together and tried to put the back on, the cable was too thick and it pushed the board. GPS signal no longer works.
Even tried replacing with thinner cable and solering direct to board but same result. satalites in view but no signal, not even outside now.
Guess ive either burned out the gps somewhere or something on the board got damaged from the cable pushing on it. Even removed the SMD contact pin and soldered wire directly onto the board. Still nothing
bazsound said:
Finally tracked the issue down to really poor GPS antenna.
Remoived it, replaced it with bare copper wire from a power cord , made sure it was well twisted so all the strands were together and neat.
Used the end of the GPS antanna that contacted the board and soldered it to the the pad of the old gps antanne end, so that when the case went back in it contacted the board pin.
Success. GPS lock indoors at a window and still picking up satilites away from window but not enough for lock.
Until i screwed everything back together and tried to put the back on, the cable was too thick and it pushed the board. GPS signal no longer works.
Even tried replacing with thinner cable and solering direct to board but same result. satalites in view but no signal, not even outside now.
Guess ive either burned out the gps somewhere or something on the board got damaged from the cable pushing on it. Even removed the SMD contact pin and soldered wire directly onto the board. Still nothing
Click to expand...
Click to collapse
Given up on getting this to work. either ive broken something in the gps or the phones setup has went iffy.
Satilites are apparently in view but dont ever get a signal from any, all 12 satalites sit there with zero signal even outdoors.
The easy solution?
Use my old phone that can get a lock inside next to a window as a bluetooth GPS reciever. Using Bluetooth GPS output, and then the bluetooth GPS app on my timmy phone.
Result? Perfect navigation using Tom Tom GO. This is actually a much better solution since the phones GPS is off its using much less power. My old phone is an alcatel one touch which is pretty good for battery even with gps on plus with the screen off doesnt need charged while using it for hours as gps+bluetooth.
Another advantage, i can have a gps app open on old phone for speed and have a GPS speedometer running while navagation running on my larger timmy e86.
My recomendation is just get a bluetooth GPS reciever if your gps sucks.
Hello, this is my first post on XDA. But, i have this issue with my SM-G900T. My phone keeps shutting off at random! This usually happens when i lock my phone. I have already ruled out my battery as i put it in my friends S5 and over a two day period it was working just fine (He was running stock marshmellow). I think it might be a kernel problem or something. I have also ruled out my sd and sim as it will still shutdown when they are both removed. I am starting to lose hope in this device. Please if anyone can help me that would be AMAZING!
Other info:
Have to remove battery for it to turn on again.
Currently running SmallWizV8, but was running Reserrection Remix (Nougat). So Nougat-->MM.
Does it at random. Sometimes it will shut off and other times it wont.
Date mysteriously resets to December 30th, 2013.
If anyone can help me i would be very greatful!
Edit:
I have found and fixed the issue.
It was a battery connection issue.
I found out that when i dropped it from a short height (or when its in my pocket) the battery somehow loses the connection between itself and the connection pins.
Fix:
To fix this problem (if you are experiencing this problem as well.) Just simply fold a small piece of paper once or twice and put it in between the bottom of the battery compartment and the charger side of the compartment (wedging it between the side of the battery that is facing the charging port and the bottom of the compartment seemed to work for me). Then fold another piece (twice for me) put it on top of the battery (I put mine towards the charging port as well). This should fix it.
To see if it is fixed just drop your phone from the same height (or go jogging ) and see if it turns off again.
I had this issue for awhile. And i hope that people with the same problem find this article and are able to fix this problem.
I have had this exact same problem with my S5! So glad to know that I'm not the only one. Thanks for the fix!