Hi I have an LG Gpad X8.0 v520. It has a full size USB A port. I used to use a Kingston USB 64gb with it. But then one day suddenly it stopped working. The USB was not being detected nor any other device such as usb dongle for a wireless controller. They don't get detected even when I connect using the charging micro-B port with an OTG converter. Sometimes it works perfectly and then it works for like a day maybe two then stops working again. I have no idea what triggers it but the not working times are much more than the working times. My suspicion is that it has something to do with charging the device. Perhaps media is disabled during charging and it doesn't get reenabled. But I don't have the expertise to diagnose the problem I was hoping someone could help. I have already tried restarting every time and the USB devices all work perfectly on their own.
Any help or advice would be greatly appreciated.
I am not sure if your device has a mechanical issue ( contacts or pins inside connector? ) or only software.
i have a handful of V521's and some are fast when detecting USB , other take a min or two. whenever the STOCK rom/firmware hangs or does not populate with a new usb device, i power down the device after plugging it into charger. ( this isn't fast..) when its completely in stand-by , waiting to be turned on, wait for the battery icon to pop up on the screen ( charging level / status ). the battery icon that pop's up indicates a hardware controlled charging status. insert your USB and then power ON your tablet. (note: A 1tb SSD - it takes about 9 minutes to populate under LG's file explorer after this) This should work, but from this point on, use the EJECT option ( software ) before removing the device.
-i can confirm on 4 separate V521's that if the battery is 20% or LESS, USB devices won't always work. i never found the perfect tablet charge level, but 80% seems to have no issues for me.
The FACTORY rom only likes certain partition tables, so if your USB drive or thumb drive gets messed up, check it in a linux device. (it ALSO doesn't seem to like more than 2 partitions PER usb device)
-the V521 will see a 4TB SATA SSD in a usb enclosure, but don't expect it to instantly appear.
i use a dedicated LG-v521 tablet , to transfer files wirelessly with my SHIELD TV's.
-last note for ANYONE having issues, try a WOODEN TOOTHPICK if the USB connectors are pushed down or need re-bending. I like to smash a toothpick end with a flat hammer, dip the toothpick in some super thin superglue (CA) , let it dry, and it becomes the perfect contact adjustment tool.
-DE-OX-IT contact cleaner ALSO works wonders, just kind of pricey for a one time fix. ( this stuff is amazing, but ALWAYS WIPE IT OFF after using it, otherwise it continues to remove oxidation and makes a mess )
-there is a current limit set for the USB port on this tablet, and if the USB you try, bumps it or exceeds it, i'll start the process over again with restrictions ( lower power levels ) until a valid handshake.
mprudic0404 said:
I am not sure if your device has a mechanical issue ( contacts or pins inside connector? ) or only software.
i have a handful of V521's and some are fast when detecting USB , other take a min or two. whenever the STOCK rom/firmware hangs or does not populate with a new usb device, i power down the device after plugging it into charger. ( this isn't fast..) when its completely in stand-by , waiting to be turned on, wait for the battery icon to pop up on the screen ( charging level / status ). the battery icon that pop's up indicates a hardware controlled charging status. insert your USB and then power ON your tablet. (note: A 1tb SSD - it takes about 9 minutes to populate under LG's file explorer after this) This should work, but from this point on, use the EJECT option ( software ) before removing the device.
-i can confirm on 4 separate V521's that if the battery is 20% or LESS, USB devices won't always work. i never found the perfect tablet charge level, but 80% seems to have no issues for me.
The FACTORY rom only likes certain partition tables, so if your USB drive or thumb drive gets messed up, check it in a linux device. (it ALSO doesn't seem to like more than 2 partitions PER usb device)
-the V521 will see a 4TB SATA SSD in a usb enclosure, but don't expect it to instantly appear.
i use a dedicated LG-v521 tablet , to transfer files wirelessly with my SHIELD TV's.
-last note for ANYONE having issues, try a WOODEN TOOTHPICK if the USB connectors are pushed down or need re-bending. I like to smash a toothpick end with a flat hammer, dip the toothpick in some super thin superglue (CA) , let it dry, and it becomes the perfect contact adjustment tool.
-DE-OX-IT contact cleaner ALSO works wonders, just kind of pricey for a one time fix. ( this stuff is amazing, but ALWAYS WIPE IT OFF after using it, otherwise it continues to remove oxidation and makes a mess )
-there is a current limit set for the USB port on this tablet, and if the USB you try, bumps it or exceeds it, i'll start the process over again with restrictions ( lower power levels ) until a valid handshake.
Click to expand...
Click to collapse
I am having this issue as well. No noticeable physical damage. I factory reset the device too. The usb provides power just fine. But there is no data exchange. I am using a CarPlay dongle with it and it worked all day yesterday then it suddenly didn’t work. At first I thought it was because I drained the battery to 20%. So I charged it and the issue still persists. Any ideas?
HunterDonahue said:
I am having this issue as well. No noticeable physical damage. I factory reset the device too. The usb provides power just fine. But there is no data exchange. I am using a CarPlay dongle with it and it worked all day yesterday then it suddenly didn’t work. At first I thought it was because I drained the battery to 20%. So I charged it and the issue still persists. Any ideas?
Click to expand...
Click to collapse
Tried multiple dongles too. Tired usb thumb drives and they don’t detect either.
- does the tablet have WIFI/CELL signal ?
- did you try power cycling with and then WITHOUT the USB device inserted ?
-is the battery near the end of life, IE: old lipo EVEN IF CHARGED will cause nightmares..( changed 7 tablets batteries over weird issues )
- You confirm the USB port still provides power when needed ? (ill post a pic)
Stock ROM? ROOTED?
-whatever device you plug in, does the STOCK FILE EXPLORER show anything ?
-i turned off AUDIO ROUTING USB under DEV settings, not sure if this matters ?
-Conflicting APPS trying to all see the same port ? ( ES FILE EXPLORER gave me issues )
-its possible if you plugged in a USB DEVICE that pulled too much power, the regulating IC failed?
-ODD one here, but did you wait a bit, to see if it populated ?
below is a 8TB drive in a cheap china case, works great, just need to wait about 10 mins for it to populate.
(i use a dedicated V521 for compressing files , then moving them to HARD DRIVES)
- not sure what MICRO SD card everyone uses, but i personaly like the SANSDISK EXTREME PRO ( BLACK RED ) just wish they weren't so expensive. - the V521 will move files from the MICRO SD to HDD at about 50-70MBS
Related
Is there any way to manage the USB connection when the phone is *not* plugged in? I want to be able to set whether the connection will share the int/ext SD card or be in charge only mode.
For what it's worth, I'm running CM7 Weekly 4, and LauncherPro (which I can set an icon for many system activities, but have no idea which would be the correct one).
Does anyone know how this can be done?
When you plug into an AC outlet it automatically goes to charge only, when you plug into USB it prompts by default Portal/tools..Mass storage..Charge only, you can set there.
Edit: Swyponese
Dee Ex Two - See Em Seven
Pixelation said:
When you plug into an AC outlet it automatically goes to charge only, when you plug into USB it prompts by default Portal/tools..Mass storage..Charge only, you can set there.
Edit: Swyponese
Dee Ex Two - See Em Seven
Click to expand...
Click to collapse
The question is, how can I set the mode when the phone isn't plugged into anything?
Haphim said:
The question is, how can I set the mode when the phone isn't plugged into anything?
Click to expand...
Click to collapse
Since it's not plugged into anything, there's no connection to manage. Just set the type of usb connection you want before unplugging it, then it should stay that way.
dratsablive said:
Since it's not plugged into anything, there's no connection to manage. Just set the type of usb connection you want before unplugging it, then it should stay that way.
Click to expand...
Click to collapse
That's not the point. Okay, let me explain. When I use the phone at home, I always let it share the drives. But if I'm out and need to charge the phone, but I don't trust the machine - then I don't want the drives shared, even for a moment.
However, unless I can change this without making the connection first, then either I can't charge my phone this way, or I'm risking malware getting a hold.
Since the phone remembers the last setting, it must be stored somewhere. The question is how can this stored setting be changed to prevent an issue like this from occurring.
Software = unknown, hardware = easy
If you don't mind carrying a "charge only" cable with you then you can avoid the whole issue of Malware, data dumps, etc. from a unknown PC that you just want to pull some juice from. I'm not sure if these cables are sold anywhere, but mod'ing a normal USB to micro-USB cable to make it data free is pretty simple.
On a USB connection your power (+5VDC and GND) is carried by the two outer most pins on the connector while the two inner pins carry the signal (. The I would mod the USB connector as it's bigger and much easier to work with.
Using a Dremel tool grind down the two middle connectors on the end that plugs into the PC. Make sure to remove all the copper for these two connectors, but do not hit the other two or you may damage the circuit path. Even though you are dealing with low voltage and small current levels, damage to the power connectors could cause issues.
Here is one issue though that is not limited to just this method, but to any time you charge from a PC: Per the USB 2.0 standard a PC must be able to provide a total of 500mA total for all USB connections. The USB charging standard for phones says at least 500mA. In other words, if there is anything else connected via USB or the PC manufacturer fudged the spec than the phone will see it as in invalid charging device and charge really slowly.
If you decide to try this, let me know how it turns out. I have only run this in a lab setting and have no real world data on how it holds up. Good luck.
Haphim said:
That's not the point. Okay, let me explain. When I use the phone at home, I always let it share the drives. But if I'm out and need to charge the phone, but I don't trust the machine - then I don't want the drives shared, even for a moment.
However, unless I can change this without making the connection first, then either I can't charge my phone this way, or I'm risking malware getting a hold.
Since the phone remembers the last setting, it must be stored somewhere. The question is how can this stored setting be changed to prevent an issue like this from occurring.
Click to expand...
Click to collapse
Just drag down the status bar and choose the USB Connection option to manage it and select "None." Dratsablive was right - put it in "None" mode when you disconnect at home and it will default to that when you connect again.
Nothing is going to jump onto your phone in the couple of seconds it takes to do this. Also, any windows malware on the PC will really NOT bother an Android phone.
Right, got a bit of a funny one here;
My girlfriend has 'adopted' my Atrix now I've moved on to the One X, but recently it's developed a rather frustrating issue in that the USB port appears to be broken. For charging, and data, even in recovery. I took it to bits to make sure there wasn't anything shorting out or dry solder joints (not that you can actually tell with the way the Atrixs Micro-USB port is designed) and it seems fine - in fact, I checked for continuity from the end of a USB cable connected to it to the pins at the back of the connector (I could reach) and all seemed okay so it's not the actual pins in the port either.
The phone always powers on when off when a USB cable is connected, but I assumed it might still be able to do this so long as +5v and GND were still connected (but then it should charge even if data doesn't work)
I'd probably never have gone to the effort of taking it apart if I'd realised that if I dump it in RSD or Fastboot mode it shows up on the computer fine.
What could be causing this? It really doesn't make any sense at all to me.
Edit: And of course, it's now sat, charging without using an external battery charger fine for the first time in days. I can't get it to do it at all now. Damn thing!
I have this exact same problem, when turned off, my phone recognizes the usb cable and starts up like normal, but when on, if I want it to connect to an ac port or computer, I have to wiggle and shake the usb connection until it charges and it can take anywhere from 20 seconds to 20 minutes. I swear I was about to throw my phone at a wall
On my TF201, about an hour ago, my USB connection to it just dropped. No loose connections, brand-new cable. I had thought it was just a bug in my USB drivers, so I quickly unplugged/replugged the device. No connection. I rebooted both devices at least 2 times, and still no luck. I figured that I might be able to determine what's wrong by connecting the cord to the wall plug. It charged just fine. after that, I assumed that it was the computer's USB port, so I plugged my phone into the same port. Was able to get adb connected to my phone, no issues. My question is, How could I determine what the issue is, without RMA'ing it or resetting it?
(Also wondering if me connecting a flash drive to the keyboard dock with it showing up for a split second then going away is any indication of anything, I'm just going to assume the worst and say the USB is shot)
I have the same problem bro. I don't know what to do I am be very pissed. I read somewhere on xda a guy had a problem with his epic and took a qtip with alcohol and cleaned the contacts and it worked. I will try this tomorrow and get back to you. I have tried other pc but nothing works and I hate not having root and I add-on considering selling my prime just because of this
Kinda have it working, in the sense that the USB cable, when connected, will make the device show up in Device Manager as an "Unknown Device", but much past that, I'm not sure. I don't have the device near me right now, I will on Monday, but once I can, I will try the alcohol trick, it worked for my phone, and the keyboard dock. (BTW, I did blow into the USB port, and now the devices attached show up for 45 minutes - 1 hour before they disappear, and also, when connecting an SD card into the dock, it shows up, but on the case that the micro SD is not connected in the device (Dunno if it does this normally or what)
I thought I'd throw this out here to whoever is interested in a similar install.
It's been a long while trying to figure out how to get my nexus 10 working otg without draining the battery. So, what I did was eliminate the battery all together and run it with a regulated power supply soldered to the positive and negative pins inside where the battery clip would normally go. Everything ran smooth without any errors whatsoever, then came time to test it all out by plugging the otg cable. what do you know, it worked flawlessly.
I'm able to run a usb hub with 3 flash sticks and 1 ssd hd. Hub must be powered separate with the power plug. This is a perfect setup for my situation since the tablet is installed in my truck and I wasn't too happy with the idea of having a lithium battery inside on hot summer days.
I'm pretty sure this method could even work while keeping the battery installed inside connecting the leads to a double throw relay along with a separate plug that would separate the two power sources.
Testing also passed while plugging it to the pc foe file access and debugging mode.
Hope this helps some people. Don't be shy if you need to ask any questions on this project.
Later
A pc usb port puts out 5v 500ma wich barely keeps the Nexus10 battery level
The ac charger puts out 5v 2amps
I hope your power supply is putting out same amps..
Sent from my Nexus 10 using XDA Premium HD app
Asylum01 said:
I thought I'd throw this out here to whoever is interested in a similar install.
Hope this helps some people. Don't be shy if you need to ask any questions on this project.
Click to expand...
Click to collapse
Hello Asylum,
I'm indeed interested in your setup, since OTG+charging is not possible with traditional methods (even pogo cable doesn't work along with OTG).
If I clearly understood, you opened your nexus, removed the battery and directly soldered cables + and - ?
Is it a complex operation ? (in particular to open the nexus and close it without tearing it down).
Do you have a photo of your installation ?
Thank you for your help :cyclops:
LeDuke
I'm also interested in this setup and would love to see pics!
Not to sound like a d1ck or anything, but I have a alternative. Just make a otg cable with a male and female USB ends and just hook up the male end to power lines. Them you can just use a regular USB wallwart to profile power to your drive.
I used this method to run a 1tb external HDD.
All of a sudden the USB port on my one year old V10 is having issues:
Won't "fast-charge" when plugged in to LG fast-charger. But does do and show that it is "regular" slow charging.
When unplugged, status bar battery icon still showing charging animation.
Does not switch (or give option to switch) to data when USB is plugged into computer nor does it appear as device on computer as it did before.
Battery is draining very fast, probably 2-3 times as fast as it should.
Also doing the following, don't know if related to USB issue:
When I power off completely, before, I had to press and hold down power button to power back on, and would also get a quick vibrate.
Now when phone is off, just quickly tapping power button for split second powers on phone and get no vibrate. Also when phone is off, plugging in charging cable powers on phone.
These issues just appeared out of the blue yesterday. Nothing has happened to phone - not dropped, exposed to moisture, didn't install any new apps, flash a rom, nothing new done to phone. It just started happening. :crying:
I would say that this is being caused by one of 2 things:
1. Bad charging adapter and/or cable. Either use another charger/cable, or buy an original LG fast charger replacement from somewhere like Amazon. 3rd-party stuff may or may not work out well, I would stick with LG if you want to play it safe.
2. The actual charging port on the phone is bad. In this case, no charger/cable will fix it. This will probably mean buying a new phone, unless you have warranty/insurance, the cost of getting it repaired won't be justifiable.
So far one of my 2 LG cables have gone bad, developed a split in the wire, now it charges my phone sometimes, but sometimes not. And it rarely works for copying files to/from PC. My other cable works fine for the most part.
AnonVendetta said:
I would say that this is being caused by one of 2 things:
1. Bad charging adapter and/or cable. Either use another charger/cable, or buy an original LG fast charger replacement from somewhere like Amazon. 3rd-party stuff may or may not work out well, I would stick with LG if you want to play it safe.
2. The actual charging port on the phone is bad. In this case, no charger/cable will fix it. This will probably mean buying a new phone, unless you have warranty/insurance, the cost of getting it repaired won't be justifiable.
Click to expand...
Click to collapse
I have 2 OEM LG Fast Charge 2.0 cable and brick sets, the one it originally came with plus another one I bought. I also have a second OEM battery and LG battery cradle. I've tried all these plus others I have and all get the same result.
I mostly use the cradle to keep the second battery charged and swap them out as needed each day, so I don't actually do much charging on the phone. I also use SambaDroid to move files to a PC, so the only real problem this is causing is rapid battery drain. I'm no expert but I'm guessing there's a pin in the USB port that is shorting somehow and that it's causing the battery to drain. Any hardware experts out there? I need this phone to last another year so am willing to try minor surgery if it would help and if I can find a good guide to follow.
Edit: SambaDroid not working in Marshmallow. I also sometimes just take out the SD card and pop it in a card reader.