Develop Bugs

[Q] OTG Cable stopped working on Galaxy Note 2

So I've had my OTG cables (eBay/Amazon) for quite some time now. A couple of days ago it just stopped working. I was using it to transfer files from thumb drive to/from the phone. My buddy has the exact phone I do Galaxy Note 2 and both cables I have work fine on his phone but not on mine? Phone detects that the OTG is inserted with the usual "USB Connector Connected" notification but when a USB memory stick is inserted it will not show the "USB MASS Storage" notification and I can't see the memory stick in file manager. Occasionally (1 in 20 tries) and after a reboot, it will see the stick and allow me to explore the contents. I have tried 2 different cables that used to work fine with my phone and several USB sticks that also used to work and still do work on my buddies phone.
All other functionality of the phone remains perfect as it is fairly new. Charging through USB works fine, transferring data from USB to PC also works fine. I have looked into the port with a magnifying glass and it is clean and shows no signs of debris or pocket lint and the cable has a good feel when it is inserted. Positive click.
I tried to do a restore factory settings today and still it's totally hit and miss with either OTG cable.
Any help would be greatly appreciated.

Wow 60 views and not one suggestion. Guess this must not be a common thing at all.

I just tried it and works fine for me. Maybe try a different rom or custom kernel and see if it works then...I really dont have any suggestions
Galaxy Note 2

You said you tried the cables on your buddies phone but have you tried different cables on your phone?
Also this might help you.
Its meant for the gs3 but i can confirm works great on my n2. I see the dev has updated the op and others are saying the same.
http://forum.xda-developers.com/showthread.php?t=1711009
Also want to add mar.ioo has good info here
http://forum.xda-developers.com/showthread.php?t=2217874

:silly: "Bonk on the head!" I just remembered that several weeks ago while using a 2-port cigarette lighter to charge my Note 2 and iPad at the same time resulted in a funny burning smell. I took apart this charger (Amazon) and it was fried and melted on inside and obviously was of questionable quality. I guess at the time I didn't think anything of it because both the iPad and GN2 work and charge and sync perfectly well.
I've ordered a replacement charging port. Looks dead simple to change and phone itself looks much easier to take apart than the iPhone was. I found a site that sells the OEM charge port. I picked up an extra headphone jack as well since they are cheap. Yesterday while phone was charging in car, it woke up several times with the sound indicating a charger had been plugged in even though the cable was already plugged in securely.
I have also purchased the OEM Samsung OTG USB cable that was available for the Galaxy S2. I realize that the GN2 micro USB port has 11 pins but from what I have read the extra pins are for MHL HDMI output and there is no 11 pin OTG cable in existence but the port on the GN2 is backward compatible with 5 pin USB OTG.

Fixed
Today I pulled the phone apart and fixed the charging port USB OTG problem. Both cables that I have now are in working state.
This repair was VERY easy and took about 15min. with proper tools.

Ookpic said:
Today I pulled the phone apart and fixed the charging port USB OTG problem. Both cables that I have now are in working state.
This repair was VERY easy and took about 15min. with proper tools.
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Click to collapse
Can u please elaborate how you fixed the charging port problem? I also have similar problem... Phone shows USB connector connected but no mass storage device in file explorer

Ookpic said:
Today I pulled the phone apart and fixed the charging port USB OTG problem. Both cables that I have now are in working state.
This repair was VERY easy and took about 15min. with proper tools.
Click to expand...
Click to collapse
Please let me know how you fixed it. I am facing this same issue for past 2 weeks. Is it a hardware problem?

bkar81 said:
Please let me know how you fixed it. I am facing this same issue for past 2 weeks. Is it a hardware problem?
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Click to collapse
OP said it was a hardware issue for him. OP said replacing the small pc board and ribbon cable with the Micro USB port on it fixed the issue for him. I have replaced the USB port on my wife's Note 2 in the past (for a different reason, that is stopped charging.) It is a relatively easy repair, if you have the correct tools. You have to take the phone completely apart to replace the board, so you will need the small plastic tool to separate the bezel, as well as a small screw driver. There are walk through videos available.
If you decide to try this, avoid buying a cheap part. I bought a replacement part for about $5.00 from an e-bay supplier, but the company sent me two of them, and neither one worked. I bought a good one from and would recommend ETradeSupply out of Texas. That link is for the exact part. You will also pay for shipping, but it will be a good part. You can also buy the tools you need there if you want.

[Q] a BRAND NEW kind of charging problem

Before everyone starts accusing me of not running a simple search, take it easy, been done. And yet, nothing to help me on the matter.
So here's the thing:
Her phone won't charge. Not when plugged into the wall, BUT when I plug her phone into the computer it is recognized and allows file transfer and everything, but just that - it still won't charge.
Here's what I've found out so far:
- Not a problem with the charger: I'm using the original charger, and it works flawlessly on my own Gnex running PA 4.4
- Nothing wrong with the battery: swap batteries between phones, my phone works fine with her battery, her phone still won't charge.
- When her phone is completely OFF and I plug it in to my PC, it plays the sound of connecting and disconnecting a device, and prompts that it doesn't recognize the USB device. If I tap the power button for a second while it's off (not holding it long enough for it to turn on), it does the same thing connecting-then-disconnecting sounds and "doesn't recognize the USB device".
So - has anyone ever run into this problem before? Know how to fix it? I know the chances are it's just a hardware malfunction, but it's weird because of the ability to transfer files- usually the problem is the reverse.
In the meantime we're using my phone as a charger for both batteries untill we get the spares and wall charger we ordered, but it's a real pain.
Just trying to find a better solution than taking apart the phone and try and fix it or just ordering a new Nexus 5 (which is tempting, but don't really have the money to spend on it...)

-Psycho- said:
Before everyone starts accusing me of not running a simple search, take it easy, been done. And yet, nothing to help me on the matter.
So here's the thing:
Her phone won't charge. Not when plugged into the wall, BUT when I plug her phone into the computer it is recognized and allows file transfer and everything, but just that - it still won't charge.
Here's what I've found out so far:
- Not a problem with the charger: I'm using the original charger, and it works flawlessly on my own Gnex running PA 4.4
- Nothing wrong with the battery: swap batteries between phones, my phone works fine with her battery, her phone still won't charge.
- When her phone is completely OFF and I plug it in to my PC, it plays the sound of connecting and disconnecting a device, and prompts that it doesn't recognize the USB device. If I tap the power button for a second while it's off (not holding it long enough for it to turn on), it does the same thing connecting-then-disconnecting sounds and "doesn't recognize the USB device".
So - has anyone ever run into this problem before? Know how to fix it? I know the chances are it's just a hardware malfunction, but it's weird because of the ability to transfer files- usually the problem is the reverse.
In the meantime we're using my phone as a charger for both batteries untill we get the spares and wall charger we ordered, but it's a real pain.
Just trying to find a better solution than taking apart the phone and try and fix it or just ordering a new Nexus 5 (which is tempting, but don't really have the money to spend on it...)
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Click to collapse
Its the micro USB port the pins are bent homie.
Some pins allow charging some allow data transfer. The ones for charging are damaged in your case.
Sorry to bring bad news.

DR3W5K1 said:
Its the micro USB port the pins are bent homie.
Some pins allow charging some allow data transfer. The ones for charging are damaged in your case.
Sorry to bring bad news.
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Click to collapse
Yup. Just this moment after a really really really close examination of the port and comparing it to my own phone, one tiny half a millimeter peice of metal is bent out of place and broken. Gotta order a new port ASAP and try and change it.
Thanks mate!
But hey, look at the bright side... a fun home project to immerse myself in instead of prepare for my finals! :laugh:

DR3W5K1 said:
Its the micro USB port the pins are bent homie.
Some pins allow charging some allow data transfer. The ones for charging are damaged in your case.
Sorry to bring bad news.
Click to expand...
Click to collapse
Back with worse news. Just replaced my wife's micro USB port on her i9250 GNex, and.... same thing. Still won't charge, computer recognizes it. Now I'm completely baffled. Thought for a moment that maybe I had been such a fool as to have put back in the old port, but unfortunately, it wasn't my stupidity.
Ideas, anyone?

[Q] Nexus 7 won’t charge

Hi I bought my Nexus 7 2013 used in February. It came with a 3rd party charger and usb cable. It’s worked fine since I got it and it use to charge fine. I would use different usb cables and they would all work. Within the past 2 weeks or so it has become increasingly hard to charge it. Also this started happening on the stock 4.4.4 rom with root enabled. Today I installed a custom chroma 5.1.1 rom just to see if anything changed but it’s the same result it doesn't charge. The chroma rom says it has the Franco Kernel. Not really sure what that means but the stock rom's kernal wasn't changed.
I've left it off and connected charging to the AC for hours and would turn it on and it would have not raised at all in battery charge percentage. When it’s on and I can better see the percentage in this battery app I have installed I noticed if I jiggle the cable at all it will disconnect and connect again. So it might not be making good contact. It does this with every usb cable I have tried on it. However when I don’t move it and have it charging in sleep mode it does see it as connected and it says charging in the battery monitor widget app when I wake it, but it doesn't charge stays at the same percentage or lowers.
There is sometimes where I get lucky and it starts charging but it’s becoming increasingly tougher to get that to happen. I haven’t had any luck since last night messing around with it with different cables. I've even tried charging it on my PC but it’s the same result. It says charging but it doesn't charge. However if I do connect it to the PC I can view the files on the Nexus 7 fine as long as I don’t move the Nexus 7 much. I've also tried the AC adapter on my phone to see if it works and it works fine and charges. I've tried a kindle fire 9w charger on the Nexus 7 and that doesn't charge either.
Any idea what’s the problem? If I buy the official AC charger do you think it would work? Am I better off buying a Qi wifi charger? I rather not waste money on the AC charger if there is a good possibility of it not working.

Hi,
I seem to have the same problem recently. I am running on 20150519 CM12.1 nightly right now but this problem started to occur about 2 weeks ago i.e. with an older nightly version running...
It really feels like the USB connector is broken. I have to move it the same way headphones jack has to be moved when it is broken. Have you tried more different chargers? I did but no solution.... Now I got it luckily charged to 90% and I am making a quick backup.
Do you have still warranty? I technically do but would need to get back to stock and lock the bootloader back.
I found threads on how to get back to stock via USB connection but is it possible to lock the bootloader without being able to connect USB to computer?

No unfortunately I have no warranty since its a used item. I tried the 3rd party cheap charger, amazon kindle fire charger and my phone charger on it they all don't charge. I think you can replace the USB board on it but that would require opening it up and doing the repairs yourself. I think I will just get a Qi charger and see if that works. I kinda don't want to spend money on that just to find out its my battery that doesn't work. I am not sure what the problem is since I can connect the nexus 7 to my PC and it will see it and its files fine. So I know the USB port works at least a little bit.

It's a sub-board (usb-sim-touch module) issue. I would reccommend using a wireless charger as a quick fix since the wireless charger module is located on the motherboard itself so you should be good.
I may have a few sub-boards for the 2013 lying around but i'm not sure if they're 100% okay - as in calibrated, tested and fully functional. Also, i'd need to know if yours has LTE or not.

I have a Nexus 7 2013 32gb wifi edition. Thanks for the info. I put in an order for one of those wireless chargers.

MobRookie said:
Hi, I seem to have the same problem recently.
I am running on 20150519 CM12.1 nightly right now but this problem started to occur about 2 weeks ago i.e. with an older nightly version running...
It really feels like the USB connector is broken. I have to move it the same way headphones jack has to be moved when it is broken. Have you tried more different chargers? I did but no solution.... Now I got it luckily charged to 90% and I am making a quick backup.
Do you have still warranty? I technically do but would need to get back to stock and lock the bootloader back.
I found threads on how to get back to stock via USB connection but is it possible to lock the bootloader without being able to connect USB to computer?
Click to expand...
Click to collapse
eureca said:
I have a Nexus 7 2013 32gb wifi edition. Thanks for the info. I put in an order for one of those wireless chargers.
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Click to collapse
perhaps you did that already, but from experience i must say that in 9 out of 10 cases it's the cable and 8 out of 10 cables are mediocre as compared to how it could be. no why i say that ist because i tested something between 50 and 60 cables during the last 2 years because i had similar issues and bought a special ampere and voltmeter with with the correct usb ports to measure the flow, same device, same power source, thus as empiric as possible result most cables charged between 0.9 and 1.1 A while about 10% were half of that and only few charged at 1.5A while 3 charged at between 1.9 and 2.1A. understand me right, same device, same charger, sam place all same condition, in car, on motorbike, on wall plugs. only significant difference were the cables. so check those first before taking more costly path which then only remain workarounds.
BTW amongst the bad ones were many that came out of the box with the devices and from different oems but many samsung original cables.
what i did i painted the ends of each cable with red for bad, yellow for ok, green for good and the outstanding ones already had a color, it were the stock cables from the oneplus one which had the best charging rate. good luck

My Note 8 won't charge, not sure if flex issues because it recognizes a otg cable

(Not a native english speaker, sorry for any bad writing) Good Afternoon, first post made in this forum and I'm very desperate to find out why my tablet is not charging, I have tryed with 2 different charges and 3 usb cables but nothing, but when i connect a OTG cable with or without a USB pendrive in it, this will be recognized so i'm not not sure what the problem may be.
It is the chargers?
The Micro USB cables?
Or the Power Source?
Plz help me. Thank you.
Edit: Forgot to add, it will occasionally after several Hours to start charging back, but if i move it just a little bit it will stop charging.

SleepyShoku said:
Edit: Forgot to add, it will occasionally after several Hours to start charging back, but if i move it just a little bit it will stop charging.
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Click to collapse
This is your problem: loose USB charging port. Search Ebay for this part, may be cheaper if from China
Be aware that a defective USB port can read data but not charging or vice versa.
http://www.ebay.com/itm/ORIG-New-US...108?pt=LH_DefaultDomain_0&hash=item5d5a6ac87c
Replace this one is easy, just need taking the back cover off, remove two screws from this USB flex FPCB. Make sure search YouTube how to open the rear cover. Open the wrong way, you'll permanent damage it. Don't ever use metal prying tool to open the case.
This one is just an example:
https://www.youtube.com/watch?v=qdAEqgtqtxM

N5110 charging problem

I have a problem with my note 8.0 for about a month. One time it's charging just fine, the other time it doesn't charge at all... The same with connecting with computer via USB. No matter what cable/charger i use. Suprisingly i can flash it, with no problem and i can connect USB stick via OTG anytime. I also tried opening it and removing battery for several hours, but that only worked once. Anyone has any idea what can i do next to solve this problem?

I use an app called Galaxy Charging Current. It enables you to get a rough idea of what the current of your device is drawing:
https://play.google.com/store/apps/details?id=com.abmantis.galaxychargingcurrent.free
For a Galaxy Note 8, it should be around 2 Amps, or 2000 mA, but it's likely to be around 1.7ish. I also use a device like this: http://amzn.eu/9aHm97o which you can also use to check current draw and test cables.
Not much help, but it may help you find out whether the device is taking a charge, or if there's a fault with a cable or charger.

potworzak21 said:
I have a problem with my note 8.0 for about a month. One time it's charging just fine, the other time it doesn't charge at all... The same with connecting with computer via USB. No matter what cable/charger i use. Suprisingly i can flash it, with no problem and i can connect USB stick via OTG anytime. I also tried opening it and removing battery for several hours, but that only worked once. Anyone has any idea what can i do next to solve this problem?
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Click to collapse
After time the USB port gets loose around its connector, and does not hold the cable end tightly. Try replacement USB port. They are cheap and easy to replace.
Another thing is some aftermarket USB cables have weak connectors. Lightly crimp the center with small pliers as to compress top and bottom. I said lightly. It will put more pressure to the internal contacts so they are snug. May take a few attempts as you may be too light on crimping, but that is a good thing.

potworzak21 said:
I have a problem with my note 8.0 for about a month. One time it's charging just fine, the other time it doesn't charge at all... The same with connecting with computer via USB. No matter what cable/charger i use. Suprisingly i can flash it, with no problem and i can connect USB stick via OTG anytime. I also tried opening it and removing battery for several hours, but that only worked once. Anyone has any idea what can i do next to solve this problem?
Click to expand...
Click to collapse
Clean your cable heads with fingernail polish remover
Let it dry some and push it in and out of the charging port til you get proper amps