Phone not recognized by PC and it says device has malfunctioned

[twistyplain]

Hi guys. I recently used a questionable charger with my phone (leeco le 2 x526) and since then it has been problem after problem with the USB port. Immediately after that charge, the phone stopped charging with the supplied quick charging brick. It won't even charge slowly. The phone behaves like the charger is being plugged in and out about five times and then completely stops as if the charger is no longer detected. However ,when I put it in a normal slow Samsung charger, it charges to the end without disconnecting.

It's not only the charging that's not working. A Windows PC I have connected the phone to before doesn't recognize it so mtp doesn't work. The PC says the device has malfunctioned and windows does not recognize it. Lately the phone has started rebooting randomly so it seems like I need to fix it soon.

Also, when I plug in headphones using the 3.5mm dongle, I hear crackling sounds for the first few seconds and Jack detection doesn't work sometimes until I reboot. Sounds play okay when it's detected. The microphone and media control buttons on headset have stopped working and I hear static when I press the buttons on my headset, sometimes it's quiet.

I'm pretty sure the USB board is the one that's damaged but want to know if anyone else has faced this issue. If it's the USB+mic board that's damaged I'll order one on AliExpress. I found it for like 8 bucks.

I'm thinking I have a hardware failure because since it started acting up, I tried to flash a ROM clean and got an error in TWRP. The flashing finished but I saw a red error message:

rcv error in uevent

I googled and this error occurs when the kernel fails to initialize a hardware component.

Has anyone experienced the same problem? I don't want to replace the board without a second opinion.

 

[tsongming]

I believe that you are definitely on the right track with the replacing board, this same exact issue happened to me once on my first Leeco X727. In my case I was lucky enough that Amazon agreed to exchange it for a new phone. Without a doubt, many Le Pro 3 owners have seen this exact issue. Your questionable charger possibly shorted out the USB card.

I would strongly suggest that you replace the battery, while you are at it, it will also be very cheap.

You will need to use a Heat gun to remove the display without damaging the LCD, there are many videos on youtube that demonstrate the quick sweeping technique and the glue will easily release enough that the screen will come off simply by turning the phone onto its face side.

While you can also use a hairdryer, you will need to run a guitar pick along the edge of the screen to remove the display and it's very easy to damage the LCD...I did! Consequently, I bought a heat gun at harbor freight for $ 7 dollars, to easily the display on a friends X720.


Good Luck.

PS : Did you receive your Le Pro 3 yet?

 

[twistyplain]

I believe that you are definitely on the right track with the replacing board, this same exact issue happened to me once on my first Leeco X727. In my case I was lucky enough that Amazon agreed to exchange it for a new phone. Without a doubt, many Le Pro 3 owners have seen this exact issue. Your questionable charger possibly shorted out the USB card.

I would strongly suggest that you replace the battery, while you are at it, it will also be very cheap.

You will need to use a Heat gun to remove the display without damaging the LCD, there are many videos on youtube that demonstrate the quick sweeping technique and the glue will easily release enough that the screen will come off simply by turning the phone onto its face side.

While you can also use a hairdryer, you will need to run a guitar pick along the edge of the screen to remove the display and it's very easy to damage the LCD...I did! Consequently, I bought a heat gun at harbor freight for $ 7 dollars, to easily the display on a friends X720.


Good Luck.

PS : Did you receive your Le Pro 3 yet?

Thank you so much for this advice. I will replace this board and see if it solves the problem. About the heat gun, I don't know if I will use it much after this repair so I'll take the phone to my friend who has a repair shop to change it for me.

One quick question... Is there a high possibility of damaging the battery during this repair? I don't want to replace it if I don't have to because mine is still pretty good and keeps like a new one. I don't have much luck with AliExpress because the original batteries for Le 2 cost almost $150 to ship. The rebranded batteries cost less to ship (~$10) but I don't know which one is reliable.

My Le pro 3 is still in transit. I reckon it's still about 2 weeks away because shipping takes very long to my country. I'm just now going through the various development threads to find a good ROM for it. Thanks again -- you're a godsend ???.

 

[tsongming]

Thank you so much for this advice. I will replace this board and see if it solves the problem. About the heat gun, I don't know if I will use it much after this repair so I'll take the phone to my friend who has a repair shop to change it for me.

One quick question... Is there a high possibility of damaging the battery during this repair? I don't want to replace it if I don't have to because mine is still pretty good and keeps like a new one. I don't have much luck with AliExpress because the original batteries for Le 2 cost almost $150 to ship. The rebranded batteries cost less to ship (~$10) but I don't know which one is reliable.

My Le pro 3 is still in transit. I reckon it's still about 2 weeks away because shipping takes very long to my country. I'm just now going through the various development threads to find a good ROM for it. Thanks again -- you're a godsend .

No problem.

The battery is underneath the heat shield so it will not be affected by the heat gun.

Attached are pictures of my LeEco Pro 3 with and without the main heat shield...On the far left
https://dl.xda-developers.com/thumbs/4/7/3/9/9/6/8/4739968.jpg
( Ignore the writing, I combined those photos for a solder repair suggestion in a unrelated post)

Edit: Opps, that link didn't work to well, here is the actual post link with better quality photos.
https://forum.xda-developers.com/showpost.php?p=79303956&postcount=72

 

[twistyplain]

No problem.

The battery is underneath the heat shield so it will not be affected by the heat gun.

Attached are pictures of my LeEco Pro 3 with and without the main heat shield...On the far left
https://dl.xda-developers.com/thumbs/4/7/3/9/9/6/8/4739968.jpg
( Ignore the writing, I combined those photos for a solder repair suggestion in a unrelated post)

Edit: Opps, that link didn't work to well, here is the actual post link with better quality photos.
https://forum.xda-developers.com/showpost.php?p=79303956&postcount=72

I flashed a ROM from 4pda and totally messed the phone up. That ROM failed to boot and to make matters worse, it formatted my data partition. Everything is gone including my backups and I cannot transfer a new OS to the phone because my USB port doesn't work. The only thing I can do now is to shelve this phone until the replacement USB board arrives. You have been of great help and I appreciate it extremely. I'm using a feature phone now until my pro 3 comes. To use any Android app I have to share my wife's phone which just sucks. (She barely puts the damn thing down)

 

[tsongming]

I flashed a ROM from 4pda and totally messed the phone up. That ROM failed to boot and to make matters worse, it formatted my data partition. Everything is gone including my backups and I cannot transfer a new OS to the phone because my USB port doesn't work. The only thing I can do now is to shelve this phone until the replacement USB board arrives. You have been of great help and I appreciate it extremely. I'm using a feature phone now until my pro 3 comes. To use any Android app I have to share my wife's phone which just sucks. (She barely puts the damn thing down)

No doubt we never realize how much we rely on these devices until they are gone.

You will definitely love the Le Pro 3, it is much more powerful, and the camera is phenomenal.

 

[twistyplain]

No doubt we never realize how much we rely on these devices until they are gone.

You will definitely love the Le Pro 3, it is much more powerful, and the camera is phenomenal.

Absolutely true. I have a new found appreciation for my phone. Now that I think about it, with the time I spend on it I think some digital detox is in order.

 

[twistyplain]

I received the USB board from AliExpress but it is incompatible with x526. Anybody with information on where I can get a board for x526 please share it here. All USB boards on AliExpress are for x620 and they can't work on x526.

I am actually thinking about looking for the x526 board in India because that's where the phone was built for. I just haven't figured out how to go about it. But I reckon there is a lot more need for spare parts there because of the high number of people using the phone.

 

[alqi]

I received the USB board from AliExpress but it is incompatible with x526. Anybody with information on where I can get a board for x526 please share it here. All USB boards on AliExpress are for x620 and they can't work on x526.

I am actually thinking about looking for the x526 board in India because that's where the phone was built for. I just haven't figured out how to go about it. But I reckon there is a lot more need for spare parts there because of the high number of people using the phone.

X620 and x526 are quite different. These two phones share the same case, battery and LCD screen, nothing else.
Here is a link to buy a usb board for x52x:
US $8.99 10%OFF | Used Original USB Plug Charge Board For Letv LeEco Le 2 X520 X526 free shipping
https://s.click.aliexpress.com/e/e9YBAJQ

 

[twistyplain]

X620 and x526 are quite different. These two phones share the same case, battery and LCD screen, nothing else.
Here is a link to buy a usb board for x52x:
US $8.99 10%OFF | Used Original USB Plug Charge Board For Letv LeEco Le 2 X520 X526 free shipping
https://s.click.aliexpress.com/e/e9YBAJQ

My le 2 is finally back to full working condition thanks to you. This USB board doesn't look used at all. The best part is that mtp and fast charging are working again.