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"USB cb wake lock" "vbus_present" etc. battery charging when unplugged.

"USB cb wake lock" "vbus_present" etc. battery charging when unplugged.
Hi All,
This is not a question, its something I want to share as I searched a lot and read a lot on this.
After flashing a 300+ roms without a problem, my S2 decided that it was going to suddenly and randomly act up.
The battery acted as if if was charging when unplugged. Betterbattery stats showed "USB cb wake lock" + "vbus_present" using massive amounts of battery.
I flashed a few stock roms, some custom and many kernels with ODIN but nothing fixed it.
Eventually I had 8-9 back ups on my phone and I tried each of these but the error continued in all but one. After days of frustration I was beginning to think it was a hardware USB issue that I need to replace the part. But no, one of the restore fixed it.
It started acting up today but I cleared battery stats and fixed permissions and all is well again.
Not sure why this randomly happened but I wanted to share this as many are of the opinion its always a hardware issue and needs replacing when clearly there are exceptions to this.
If anyone understand why the above worked, I would appreciate comments as there are some very clever people here and I am sure some of you have fixed this issue.
Thanks.

My two cents on how or what is happening, however not on the software side: Some people with the same issue report that cleaning the USB-port with a toothbrush or any soft brush helped, and sometimes the issue appears or disappears randomly. I guess that the USB connector is badly soldered/mounted onto the board. This could explain why the issue comes and goes, because if the connector gets pushed/pulled in the right direction, the port could reconnect.
I had the same issue, the wakelocks, 'charging' written on the lockscreen, and every now and then the 'charger connected' sound. However flashing, batterystats-wiping and whatnot did not help. Only when I exchanged the board in the lower end (where the USB connector is) with one I had lying around the issue disappeared and has in the two months since never reappeared.
If this keeps happening, it could be worth a try, and it is quite easy to do. There is a very nice photo guide on here somewhere on replacing the screen, it explains it all and is no different for the USB-connector. It also is a possibility, if you don't mind the trouble, to reflash to stock and let the phone be repaired at a service centre.
If you need help or the link to the photo guide, I might still have it somewhere.
I hope this helps.

Coirpre said:
My two cents on how or what is happening, however not on the software side: Some people with the same issue report that cleaning the USB-port with a toothbrush or any soft brush helped, and sometimes the issue appears or disappears randomly. I guess that the USB connector is badly soldered/mounted onto the board. This could explain why the issue comes and goes, because if the connector gets pushed/pulled in the right direction, the port could reconnect.
I had the same issue, the wakelocks, 'charging' written on the lockscreen, and every now and then the 'charger connected' sound. However flashing, batterystats-wiping and whatnot did not help. Only when I exchanged the board in the lower end (where the USB connector is) with one I had lying around the issue disappeared and has in the two months since never reappeared.
If this keeps happening, it could be worth a try, and it is quite easy to do. There is a very nice photo guide on here somewhere on replacing the screen, it explains it all and is no different for the USB-connector. It also is a possibility, if you don't mind the trouble, to reflash to stock and let the phone be repaired at a service centre.
If you need help or the link to the photo guide, I might still have it somewhere.
I hope this helps.
Click to expand...
Click to collapse
Very much appreciate your reply and you could be right about the bad soldering issue, I am going to order the part anyway and have it on stand by.
It was strange that all of the roms, kernels and backups did not work except one. I did the port cleaning and all that too but to no avail but it might be all coincidence that it worked with the backup for a finish. which reminds me, I better change my signature
Thanks or your reply and for your offer to help, it is much appreciated. Thankfully its running butter smoothe at present and I wonder if the USB port is susceptible to moisture too, which might be my issue.

USB contact weakness?

My Sony Ericsson Xperia X10 is 2 years old. The last few months, I have had problems charging the phone and connecting it to the computer.
In order to charge, I have to "wiggle" the cable into the right position. When I try connecting to the computer via cable, the phone appears to disconnect again within few seconds, and then reconnect - I am returned to the screen that shows the green android figure and that asks if I want to connect to the computer.
I have tried with a new USB cable. Charging gets easier (not so much "wiggling" required), but the problem with connecting to the computer is the same.
Does anyone know what the problem might be? Is this a hardware weakness, so that Sony should repair it? Or should I just buy a new phone?

Hardware Weakness

Should probably rephrase... Is this a KNOWN hardware weakness with this type of phone, so that it should be covered by the reclamation rights?
If not, the store will probably claim that this is my fault, or a device only expected to last 2 years, so that I have to buy a new phone.

Had a similar problem, solution?? Well is easy, if look (in your phone) into thd little microusb hole, youll find a little object like a sheet. Just move it. Up or down with a little screwdriver. Try the usb if not working move it upside down. JUST DO IT WITH CAUTION THAT PIECE IS TOO WEAK AND IS DANGEROUS. IT WORKED FOR ME BUT I CANNOT WARRANTY ITLL WORK FOR YOU
Sent from my X10i using xda app-developers app

I've got the same problem.. but there is no sw solution (of course..), so you have to fix it manualy.. I wanted to do it myself, but there are too small micro ****s, so I left that... I'll try it later..

I just had the same problem as yours and I asked for a technician to solder a new USB port for me. And he did it, I no longer have this problem. It is a very annoying problem, sometimes when you're transferring datas, the USB would disconnect with a just a slight bump.

I've got this problem on my x10 also, but beware - it may be something as simple as the USB cable is worn out. I thought my problem was with the phone, until I used a car charger with it and it charged perfectly - no wiggling of the cable required.
Sent from my LT26i using xda app-developers app

Thanks for all the replies.
Unfortunately, it is easier to buy a new phone than to go through the 3-weeks process of having a service center determine if the problem can be solved and if it will cost me.
Fortunately, I'm able to use another phone to copy the data from my memory card onto my computer, before I switch to a new phone
To the last poster: As written, I tried with a new cable, without much luck.

[Q] Need to fix usb connection, no adb/fastboot. Alternate motherboard points?

Well the microusb on my N7 has been half broken for almost a year now (worked only the first month before it was dropped with a cable in). Its always been able to charge and it must be a hardware issue, my other N7 connects fine to the same computer port and cable. I've also tried many other cables and computer.
Now normally this isn't a huge deal as I just transfer things I need over samba but I now have a new situation.
An OTA bootlooped it, its with stock recovery, factory reset still results in a bootloop, I can get to the bootloader fine but since my data connection never works fastboot is a no go, replacement microusb modules are $60+
I replaced the screen last month myself so my warranty is gone.
I'd like to make a temporary connection to the motherboard just to fastboot a factory image and twrp. There seem to be a few data points that could work, this thread shows one beside the battery connector http://rootzwiki.com There is also the one on the microusb module itself above the actual plug but that whole module could be messed up so I'd rather try another.
I'm not great with soldering and there is no way I could solder either of those spots on my own. Are there any other spots that would be easier? Would only the data +/- points be needed to the cable? Or is the 5v and ground needed to?
Thanks!!

If I'm not mistaken if you buy a n7 official dock. It connects via the 4 round brass dots on the bottom of your n7 I forget what the proper term is lol. Anyways its the same as USB as far as I know. Or find the pinout of them and make something.
Sent from my Nexus 7 using XDA Premium HD app

ronedogg said:
If I'm not mistaken if you buy a n7 official dock. It connects via the 4 round brass dots on the bottom of your n7 I forget what the proper term is lol. Anyways its the same as USB as far as I know. Or find the pinout of them and make something.
Click to expand...
Click to collapse
Looked into it, its charge only, no data. Thanks though

N7 screen issue + not recognized by PC

So I have an issue with a 2012 N7, warranty is long gone. I've tried all suggestions from billykxda's thread, but no luck thus far. I've also tried Google's official page on the topic as well.
I've left the device charging for many consecutive hours, both via AC power and USB, and I suspect my issue resides with the LCD screen. Also tried a hard battery pull. It's also important to note that I haven't undertaken any mods on the device at all, i.e. the bootloader is still locked and USB debugging is not enabled yet.
When I plug the device into my PC the Win7 driver notification bubble pops up, usually reporting either an Unknown Device or an "APX drivers not installed" message. I'm unable to get it to boot into Fastboot, Recovery, or Android OS. Plugging/unplugging the device via USB yields these driver messages over and over again, along with the Win7 sound notification, so the device isn't totally dead, but no amount of button combinations or 30-60+ second button holds are getting any response.
Has anyone else experienced these issues before? Do you think my device is totally dead?

AvidPhisherman said:
Has anyone else experienced these issues before?
Click to expand...
Click to collapse
Yes; I am also experiencing similar issues. Unfortunately, I have not reached a solution. I just replaced a broken screen for a friend. Once I got the screen in, I tried turning it on but didn't see anything happen. I began to research and thought I had the dead battery issue that most people get when leaving it unplugged for an extended period of time. I plugged it in using the wall adapter for a few hours, used the power+volume buttons and still didn't get any response. Finally, I decided to charge it with my PC. The PC recognized something was plugged in, installed drivers, and now I have a Nexus 7 in my connected devices list. While connected to my PC, I hold power+volume down and hear the USB disconnect, reconnect, and have an unrecognizable device attached. This leads me to believe that the Nexus 7 is working properly and the screen is not working. I have taken the entire device apart to re-seat all connections 3 different times and still cannot get it to work. I hope someone can shed some light on our issues!
Edit: I forgot to mention, I also tested the battery with a digital multimeter. It reads approximately 3.79 volts DC. I thought it may be important to state this in case the issue is battery related. I'm not certain what the correct value should be for it to work properly.

I am currently trying to diagnose this problem. Yesterday, I hopped on Craigslist and bought a working Nexus 7 for 50$. I am currently taking it apart to rob parts from it and figure out where the problem is. So far I have tested the battery. The battery reads approximately 3.78 volts DC so I can probably rule this out as my problem.
Also, I noticed something strange yesterday. I took the broken Nexus with me when I went to meet up with the man selling the used/working Nexus. While I was outside in very bright sunlight, I pushed the power button on the broken Nexus. I noticed that I could actually see the screen doing something. It was all fuzzy and had lines running every where, but you could in fact see it doing something. I think the replacement screen I received is bad, but I won't know until I start swapping parts.
AvidPhisherman, for now maybe try taking your Nexus out in very bright sunlight and see if you can see the screen do anything when you press the power button. Also, I'm not trying to hijack the thread. It seems that we have very similar issues. I hope to find something that fixes both of our problems.

Success.... kinda. I tried combining the broken Nexus 7 motherboard with the working Nexus 7 screen but it wouldn't fit since one is the 3G model, and the other is the Wifi only model. Next, I put everything back together on the broken N7, but this time I used the LCD ribbon cable from the good N7. Success!!! It powered up, and I can see the screen. My problem now, is that the screen is mostly unresponsive and acts like you are touching it in random spots, when you're not touching it at all. I'm taking it apart to re-seat the connections... again.

__redfox__ said:
Success.... kinda. I tried combining the broken Nexus 7 motherboard with the working Nexus 7 screen but it wouldn't fit since one is the 3G model, and the other is the Wifi only model. Next, I put everything back together on the broken N7, but this time I used the LCD ribbon cable from the good N7. Success!!! It powered up, and I can see the screen. My problem now, is that the screen is mostly unresponsive and acts like you are touching it in random spots, when you're not touching it at all. I'm taking it apart to re-seat the connections... again.
Click to expand...
Click to collapse
Hey redfox thanks for taking in interest in this! You're not hijacking the thread, your posts are very helpful. Good to know I'm not the only one experiencing these issues.
I'm just a hobbyist with an interest in fixing things, although I don't have much experience with DIY fixing. I didn't have a chance to try turning the screen on under direct sunlight, but yesterday I took both my non-working Nexus 7s (the first one I mentioned in my OP, the second one just has a bad/hollowed out USB port) in to a repair shop for a free diagnosis. I'm actually a business user, my company owns the tablets but I'm responsible for maintenance/tech troubleshooting.
Please keep me posted with updates as to how your progress is going. I'll post again once I get a report from the repair shop re: my issues.

Hi,
I have been having the same problem,
I bought my wife a used Nexus 7 and it worked just fine for almost a year then all of the sudden the screen would not function
there would be lines going through it but it remain dark.
thank you for researching the matter i will try to buy the part online and see if i can get it to work now!
if i understand it correctly there is no need for a new mother board but just a new LCD ribbon cable?

godnessy said:
Hi,
I have been having the same problem,
I bought my wife a used Nexus 7 and it worked just fine for almost a year then all of the sudden the screen would not function
there would be lines going through it but it remain dark.
thank you for researching the matter i will try to buy the part online and see if i can get it to work now!
if i understand it correctly there is no need for a new mother board but just a new LCD ribbon cable?
Click to expand...
Click to collapse
I cannot guarantee that it will fix your screen, but it is possible. When I had this one out in the sun, it did the same thing. The screen was super dark, and I could see crazy lines. Hopefully a new ribbon/cable will fix your problem. They are only a few dollars on Amazon.com

godnessy said:
Hi,
I have been having the same problem,
I bought my wife a used Nexus 7 and it worked just fine for almost a year then all of the sudden the screen would not function
there would be lines going through it but it remain dark.
thank you for researching the matter i will try to buy the part online and see if i can get it to work now!
if i understand it correctly there is no need for a new mother board but just a new LCD ribbon cable?
Click to expand...
Click to collapse
__redfox__ said:
I cannot guarantee that it will fix your screen, but it is possible. When I had this one out in the sun, it did the same thing. The screen was super dark, and I could see crazy lines. Hopefully a new ribbon/cable will fix your problem. They are only a few dollars on Amazon.com
Click to expand...
Click to collapse
Hello fellow users! Quick update, I finally heard back from the repair shop.
Bad news - they tried swapping out the screen, then the battery, USB charging port, display cables, etc. etc. and nothing worked. Their diagnosis is that the tablet has a fried motherboard, and they're unable to repair and/or replace it
Good news - it cost me nothing to receive this diagnosis
Hopefully the outlook is not so grim for your respective N7s. Just wanted to post an update as to what I learned from this whole experience.

Hi guys, Reporting in.
Toke a while but i got the part AND found the stupid device!
After ALOT of fiddling, taking apart and putting back again i found out that the problem was the battery!
it looks like it was on its last leg and that caused all the strange screen stuff.
I dont have another battery to replace it so instead i hooked it up straight to a USB cable and into the socket and it works just fine
thanks for the tips and hopefully this helps someone else!

S7 Edge will not fastcharge or be recognized on PC?

Hey all!
I have been having a huge issue with my SM-G935A for a few weeks now, and I would really love you guys' help finally resolving this!
There are 2 main issues:
When plugged into my PC via (any) micro USB cable, Windows displays "The last USB Device you connected to this computer malfunctioned, and Windows does not recognize it."
And when I am charging the device via (any) micro USB cable, it does NOT fast charge. HOWEVER, if that same adapter and cable are connected to my QC2 Wireless Charger, it DOES fast charge.
The troubleshooting steps I have taken already:
Made sure the charging port was clear of any dust or debris.
Inspected for any sign of damage to port. None found.
Reboot into Safe Mode.
Used rubbing alchohol and a tiny brush to clean port. Dried in front of fan for a day and rebooted.
Tried multiple combinations of chargers/cords. It should also be noted that I only have 1 PC to test device with, but drivers were uninstalled/reinstalled via google, and then again with smartswitch. My older Galaxy S6 is recognized with no porblems.
From recovery, wiped cache
The only thing left that I can think to do software related is a FDR -_- , and I have already purchased a replacement USB port for it if it is needed.
Here is an album showing charge testing and condition of port.
Anyone have any other troubleshooting steps before I have to FDR/Replace USB port?
Thanks!!!

Your micro-usb port has failed. most likely one or both of the data pins have broken.
Mine did the same thing after about a year of ownership. unfortunately you can't really replace the part either (I tried) without replacing the screen because the capacitive buttons are attached to the same board that the micro-usb port is on.
Just charge via wireless charging and hope you don't ever need to use ODIN... maybe it's time to upgrade to a new phone.

Sean89us said:
Your micro-usb port has failed. most likely one or both of the data pins have broken.
Mine did the same thing after about a year of ownership. unfortunately you can't really replace the part either (I tried) without replacing the screen because the capacitive buttons are attached to the same board that the micro-usb port is on.
Just charge via wireless charging and hope you don't ever need to use ODIN... maybe it's time to upgrade to a new phone.
Click to expand...
Click to collapse
That's what I was afraid of! But I was really hoping to be able to hold off on upgrading until 5g.
I forgot to mention, I have dropped it in the pool before too... Do you think over time this might have caused corrosion?
And is there any way to actually check the pins for damage?

metalXcore said:
That's what I was afraid of! But I was really hoping to be able to hold off on upgrading until 5g.
I forgot to mention, I have dropped it in the pool before too... Do you think over time this might have caused corrosion?
And is there any way to actually check the pins for damage?
Click to expand...
Click to collapse
I can't imagine being dropped in the pool would cause this, just poor craftsmanship from samsung. I don't think you'd actually be able to see any damage on the pins. Like I said your phone is still perfectly usable, you just can't really use the USB port anymore. Just buy a couple extra wireless chargers to keep around and transfer anything you need to your phone wirelessly.

I was actually only concerned about being able to specifically flash with Odin >.<

Sean89us said:
Your micro-usb port has failed. most likely one or both of the data pins have broken.
Mine did the same thing after about a year of ownership. unfortunately you can't really replace the part either (I tried) without replacing the screen because the capacitive buttons are attached to the same board that the micro-usb port is on.
Just charge via wireless charging and hope you don't ever need to use ODIN... maybe it's time to upgrade to a new phone.
Click to expand...
Click to collapse
Thats exactly what I was mostly needing the port working for again >.< Lol

Update: Full factory data reset did not fix issue.

metalXcore said:
Thats exactly what I was mostly needing the port working for again >.< Lol
Click to expand...
Click to collapse
ODIN really should be a last resort. If your phone still boots, there is no reason you couldn't just apply OTA patches to it for the rest of it's life. ODIN is really only necessary if you need to fix a corrupted firmware issue (which shouldn't happen ever if you're not rooted) or if you want to flash firmware for a different variant, which is sometimes handy but never completely necessary.
Factory resets can be done from within android or from the recovery menu, and OS Upgrade ZIPs can be sideloaded on the SD Card then flashed through the recovery menu. What do you need ODIN for? Honestly i think most people overuse it, it's risky flashing a phone like that. If it gets interrupted you could hard brick your phone.
---------- Post added at 11:26 AM ---------- Previous post was at 11:16 AM ----------
Also, do yourself a favor and don't try to repair the USB port. I fix phones all the time so I figured I could do it, ended up completely destroying my LCD in the process and had to purchase an entire new mid-frame assembly with LCD and charging board already installed to the tune of $225, and that was still a used part.
Let me ask you this, do you have AT&T as your carrier? And are you on a modern unlimited plan (AKA not "grandfathered"), with a paid-off device (not making payments)? If so, just call 611 and ask for the Loyalty department. They are known to provide very good deals, especially if you hint that you may switch carriers. Most people can pick up a Samsung S9 for $325 or S9+ for $425. They will make you sign a 2-year commitment but your plan's price won't change at all if you have an unlimited plan.

Sean89us said:
ODIN really should be a last resort. If your phone still boots, there is no reason you couldn't just apply OTA patches to it for the rest of it's life. ODIN is really only necessary if you need to fix a corrupted firmware issue (which shouldn't happen ever if you're not rooted) or if you want to flash firmware for a different variant, which is sometimes handy but never completely necessary.
Factory resets can be done from within android or from the recovery menu, and OS Upgrade ZIPs can be sideloaded on the SD Card then flashed through the recovery menu. What do you need ODIN for? Honestly i think most people overuse it, it's risky flashing a phone like that. If it gets interrupted you could hard brick your phone.
---------- Post added at 11:26 AM ---------- Previous post was at 11:16 AM ----------
Also, do yourself a favor and don't try to repair the USB port. I fix phones all the time so I figured I could do it, ended up completely destroying my LCD in the process and had to purchase an entire new mid-frame assembly with LCD and charging board already installed to the tune of $225, and that was still a used part.
Let me ask you this, do you have AT&T as your carrier? And are you on a modern unlimited plan (AKA not "grandfathered"), with a paid-off device (not making payments)? If so, just call 611 and ask for the Loyalty department. They are known to provide very good deals, especially if you hint that you may switch carriers. Most people can pick up a Samsung S9 for $325 or S9+ for $425. They will make you sign a 2-year commitment but your plan's price won't change at all if you have an unlimited plan.
Click to expand...
Click to collapse
I am, and that could be a very good idea- thanks!