Nexus 4 USB not recognized - Nexus 4 Q&A, Help & Troubleshooting

Hello, long story short...
Stuck on google screen, no ROM, just TWRP. ADB Fastboot don't work, phone will charge, but windows 8.1 won't recognize it, it just says USB Descriptor Failed and Not Recognized. Drivers for it don't work either.
Bad Motherboard?
EDIT:
I already tried swapping the USB PCB from another fully working Nexus 4 and it did not work anyway, while the one from this damaged one did work correctly on the other already working N4

Take it you've tried another cable and usb port on comp? Also a good chance that this is charging block on the phone rather than motherboard. Worth a try.

This may help http://forum.xda-developers.com/showthread.php?p=42022027
Sent from my Nexus 5 using XDA Free mobile app

jd1639 said:
This may help http://forum.xda-developers.com/showthread.php?p=42022027
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
I already tried that, but without the correct Device ID the drivers don't do nothing. Tried forcing them on the Unrecognized USB Device, but it failed to communicate with the phone entirely. I tried swapping another USB PCB from my wife's N4 and same problem... I think I killed this thing... man... Should I try a Laptop with Ubuntu?
EDIT:
I read in another post that it might be the internal USB connector pins (the little orange cable that plugs into the mainboard), I will check this and see if I can straighten them out. Will post back results for everyone wanting to know if this was the problem

I think I found the problem, one of the transistors is kind of blown...
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Does anyone know where I can get a replacement resistor/transistor? Doesn't look that difficult to solder.

Looks like something is bad internally, logic board replacement is inevitable. The component is called a Transient Voltage Suppressor (TVS), it's meant to protect other components, but even after shorting it still throws a not recognized message. Sorry for everyone reading this thread, you will need a replacement motherboard (logic board).

Getting the same problem, happened because of a short circuit on the car charger. Really not possible to change only the transistor? Can live without the working usb, but the horrible battery life is killing me.
Sent from my Nexus 4 using Tapatalk

Related

Need help: USB connector broke, where to get another one?

Sadly, my HTC Wizard/Cingular 8125 USB connector broke off. I'm not sure how it happened but I can only guess the pressure of inserting the mini USB cable wore it's soldered mount points and gave way. I tried soldering it back but when I adjusted those little prongs underneath so it would have good contact with the board, a prong broke off. So I'm out of luck and can't recharge the battery. Does anyone know where I can purchase the identical piece so I can solder it back to the board? Also, has anyone else had this same unfortunate fate?
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If you search the wizard forum, you can find people that have spare parts.
Check here:
http://forum.xda-developers.com/showthread.php?t=300240
thanks Calouro, I'll give that link a shot.
wow, i had that happen to me too, i send it back to t-mobile for repair. but i afraid of it happening again, bc it hard to fix and my warranty expired.
These people do USB port replacements I believe:
http://www.pocketpctechs.com/
Thanks Paul.. checking them out.
I just had the same thing happen...PPC Techs as mentioned above does that repair for $60 + shipping. They mention this issue specifically as a K-Jam fix on their web site.
I sent mine in but they advised they were unable to get ActiveSync working again after trying a number the repair a number of times. They shipped back to me via ground FedEx even though I requested 2-day so I don't have it back yet to test...
timskrastins said:
I sent mine in but they advised they were unable to get ActiveSync working again after trying a number the repair a number of times.
Click to expand...
Click to collapse
They may have induced heat damage to the USB I/O circuit. This can happen if the soldering iron is too hot or left on the contact too long. In addition, if multiple repairs where attempted with not enough cool down time between heating, the USB I/O may have been damaged.
Also, if they did a sloppy job and shorted two of the contacts together on the USB plug with solder by not completely cleaning out the old solder can cause issues.

USB Device not recognized - MTP Initialization

Ok, not sure if this should go here or the Samsung Epic 4g Touch Forum, as this is my phone and where the issue occured, but I figured this could apply to other phones and wanted to help whoever out.
Anyways, I had the phone for just two weeks and one day I connected to my computer with a micro usb cable, and the computer would fail to recognize it saying "USB device not recognized..." I tried everything including different computers, cables, reinstalling device drivers etc to no avail. Come to find out, I plugged the micro usb cable into the micro usb more firmly and pushed down on a little bit, and finally recognized the device. I guess the port was wearing down over just two weeks and the connection had come loose.
Anyways, wondering if anyone had this issue and if it was repairable as I can see the port getting progressively worst with repeated plugging and unplugging of the device. Thinking samsung would have been able to have built a more durable mini usb port for such a nicely designed device.
Well first, you were right with wondering if you were posting in the wrong place. This is the original epic forum, not the touch. Also,this question has been beaten to death already. Either your cable is faulty, or your drivers aren't fully installed. You can also remove your battery while in download mode and that can help it being recognized.
Sent from my SPH-D700 using XDA App
b16flybye -- I think I just said it wasn't the usb cable or drivers and that it was the actual micro usb port on the phone that was causing the issue.
If you truly believe that it is the port, you can get it replaced at a Sprint store.
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and sorry I meant to post in the general forum. I will move my post.
Gavisann -- Yea, it is the port. Once I push the cable in further, the device will recognize it, but once I let go, it loses the connection.
tnguyen444 said:
and sorry I meant to post in the general forum. I will move my post.
Gavisann -- Yea, it is the port. Once I push the cable in further, the device will recognize it, but once I let go, it loses the connection.
Click to expand...
Click to collapse
He also meant wrong device. This is not the Epic Touch. It is the Epic forum you are in...slide out keyboard...1 1/3 years since release.....
Sent from my SPH-D700 using XDA App
He's a long way from home. Good luck with your...port, or cable, or whatever the hell the problem is. Sounds like you knew the problem before you posted in the wrong place though.....
Sent from my SPH-D700 using XDA App

Nexus 7 USB Port (Broken Solder Pad)

Hi,
My Nexus 7 Gen 2 usb stopped charging (it was on/off for a while but now fully stopped).
I ordered a new USB component from eBay so I was desoldering the old one this morning but unfortunatley the 5 pins at the back ripped a few of the pads from the board off.
I was wondering before I order a new USB PCB for £40 is it possible to re trace the 5 pins and wire them to somewhere different on the board??
Looking at this picture this is what I thought I could do:
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Is this possible and if so the best way to fix this?
Thanks
Rowan88 said:
Hi,
My Nexus 7 Gen 2 usb stopped charging (it was on/off for a while but now fully stopped).
I ordered a new USB component from eBay so I was desoldering the old one this morning but unfortunatley the 5 pins at the back ripped a few of the pads from the board off.
I was wondering before I order a new USB PCB for £40 is it possible to re trace the 5 pins and wire them to somewhere different on the board??
Looking at this picture this is what I thought I could do:
Is this possible and if so the best way to fix this?
Thanks
Click to expand...
Click to collapse
You could try soldering to those solder pads right before the resistors/caps in the path. If you bypass those, and solder directly to the exposed pads you identified, you may have issues, i.e. those resistors/caps are probably there for a reason . That's what I would try anyways.
did you ever end up soldering to these pads? cause any issues?
neonshaun said:
did you ever end up soldering to these pads? cause any issues?
Click to expand...
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nevermind, didnt work of course. Ended up soldering to the pads just before those caps, just needed to not be lazy about it.

iPod Classic [USB C addon] [WIP]

.
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This is in the concept stage. There are no guarantees.
I am converting my Ipod classic to use a series of SD cards, and I picked up a spare iPod for cheap. This is going to be my work log for removing the stock 30 pin connector and replacing it with a USB C connector. I'll need to design and 3d print the bottom cover of the device except where the connector is. I'm not even sure if there's enough room on the board for this to happen, I might end up needing to cut into the iPod board and do tracing stuff to make room.
One thing I'm wondering is if I can attach the firewire of the iPod to the firewire of the USB c port. I think I'll try to make a 30pin connector to USB C to test and see if there's any advantage before I attach anything to the board itself.
http://pinouts.ru/PortableDevices/ipod_pinout.shtml
https://i.stack.imgur.com/Aovh5.png
https://www.mill-max.com/assets/pdfs/149.2.pdf
update 12/20/2018
I have a 3d printer now, and the dev boards have arrived.
Reserved2
Please update your work log!
I thought I was the only one wishing to upgrade my port along with my other mods to my ipod. I'm curious as to how you did it and what steps you took to make it happen! Following for future updates.
tkillen96 said:
I thought I was the only one wishing to upgrade my port along with my other mods to my ipod. I'm curious as to how you did it and what steps you took to make it happen! Following for future updates.
Click to expand...
Click to collapse
Unfortunately I'm stuck. I've tried translating the pins from one to another, but nothing I've tried works. It does not recognize it.
If someone knows what pins to what to make the conversion, all I care about is making sure it can still charge and sync. Not the other 30 pin features.
Any updates to this?
DR650SE said:
Any updates to this?
Click to expand...
Click to collapse
Am wondering the same, has anyone else attempted this? Wonder if there's a QI adapter anywhere. Would love to get rid of the crappy charging cable it requires.
Great project any news
lets reignite this project !
Save the BS and simplify it, just 4 pins, "D+", "D-", "5V+" and "GND", these are all we need to charge and transfer data.
What was the road block here? just unable to obtain USB connection ? Type C is a little tricky as it has a parallel design like lightning. Maybe you had got the pinout jumbled or connected one side in reverse? Ordering some test boards and Type C port components to see what i can achieve!
https://www.theiphonewiki.com/wiki/30-pin_Connector
Someone else commented about QI charging, it is entirely possible and would not be very difficult to do, the only problem is the iPod has a solid metal back so it would need a custom manufactured back replacement. I absolutely love the idea but i dont think anyone has the money/time/resources to design, manufacture the parts required. Because even if they did they would be sitting on it for a very long time with very limited sales(not to mention how many different variations.)

Nexus 6 Main flex?

So. I have a nexus 6 device and i sent it with a technician for a battery swap (turning of randomly). The thing is when i got it back the phone was dead, the device didn't show any sing of life (didn't boot and didn't even showed a charging animation.), i tought the new battery was the problem but the technician told me that wasnt it. I didn't receive any explanation of what happened to the device or why it didn't turn on.
Anyway. I oppened the device myself and realized that a flex was partly sliced. (the flex conected to the other flex that's supposed to be for the buttons).
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Could that be the reason why my good nexus 6 is now a brick?. When i conect it to a usb on my computer it doesn't show up in any way. maybe if i change that flex the device wont be dead anymore? hope you guys can help me thanks.
manzures14 said:
So. I have a nexus 6 device and i sent it with a technician for a battery swap (turning of randomly). The thing is when i got it back the phone was dead, the device didn't show any sing of life (didn't boot and didn't even showed a charging animation.), i tought the new battery was the problem but the technician told me that wasnt it. I didn't receive any explanation of what happened to the device or why it didn't turn on.
Anyway. I oppened the device myself and realized that a flex was partly sliced. (the flex conected to the other flex that's supposed to be for the buttons).
View attachment 5188621
Could that be the reason why my good nexus 6 is now a brick?. When i conect it to a usb on my computer it doesn't show up in any way. maybe if i change that flex the device wont be dead anymore? hope you guys can help me thanks.
Click to expand...
Click to collapse
Connection cables look okay to me since my nexus 6 didnt have a back at first so ik the battery maybe be dead but its also super dirty or it could also be a software problem
moonwolfyt said:
Connection cables look okay to me since my nexus 6 didnt have a back at first so ik the battery maybe be dead but its also super dirty or it could also be a software problem
Click to expand...
Click to collapse
Actually now that i took a closer look it seems the cable is damaged almost ripped apart you might wanna get that replaced
You can usually find spare parts like this cheap on AliExpress - but it may take a long time to deliver.
runekock said:
You can usually find spare parts like this cheap on AliExpress - but it may take a long time to deliver.
Click to expand...
Click to collapse
Use EBay I got my back cover in 2 weeks while on aliexpress I've been waiting a month to get my sim tray and case for 2 months...

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