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Desperate need. Crashed my bike. Phone started flickering now its black.

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maluminse

Senior Member
Mar 14, 2011
162
18
Chicago
Redmi K20 / Xiaomi Mi 9T
It charges. The alarm goes off in the morning. But the screen doesnt respond and at first it was flickering toward the bottom. Now its black.

Ive torn it down about 50% and dont see anything wrong. The connections seem fine.

There are three photos on the phone I must have for work. Must.

Ideas on repair? Or data recovery? When I plug in the usb to pc I hear the noise and I know its asking 'charge', or 'transfer files'. Without screen response I can do nothing.

Any assistance to get it working or data recovery would be hugely appreciate.

Edit: The glass is not cracked or broken. Ive dropped it literally 100 times. In the first month I fell and sat on it breaking the back cover. I replaced that. That was 2 years ago. Some background of the device.
 
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blackhawk

Senior Member
Jun 23, 2020
5,046
1,415
The important thing is you're ok. Lol, all my bikes are worth more than my phone... I hope yours isn't too damaged.

Try disconnect/reconnecting the battery and reboot; a hard reboot.
If you're lucky a ribbon connector, or ground pathway was displaced.

Either the display is damaged and/or the mobo.
The BGA chipsets can't have their solder joints inspected and even finding visible solder cracks is difficult on surface mount components. High G impacts and excessive flexing can internally damage chipsets, solder joints and multilayered PCBs.
 

maluminse

Senior Member
Mar 14, 2011
162
18
Chicago
Redmi K20 / Xiaomi Mi 9T
The important thing is you're ok. Lol, all my bikes are worth more than my phone... I hope yours isn't too damaged.

Try disconnect/reconnecting the battery and reboot; a hard reboot.
If you're lucky a ribbon connector, or ground pathway was displaced.

Either the display is damaged and/or the mobo.
The BGA chipsets can't have their solder joints inspected and even finding visible solder cracks is difficult on surface mount components. High G impacts and excessive flexing can internally damage chipsets, solder joints and multilayered PCBs.

A damaged lcd will flicker, not respond and go black? The glass is not cracked or broken.

The glass and digitizer are one piece it appears.


So far Ive found no ribbons disconnected. Ive inspected as close I can all visible connections. Nothing stands out.

A lcd arrives tomorrow. So well see if I get a response when I plug it in...
 
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Reactions: blackhawk

blackhawk

Senior Member
Jun 23, 2020
5,046
1,415
A damaged lcd will flicker, not respond and go black? The glass is not cracked or broken.

The glass and digitizer are one piece it appears.


So far Ive found no ribbons disconnected. Ive inspected as close I can all visible connections. Nothing stands out.

A lcd arrives tomorrow. So well see if I get a response when I plug it in...
The battery may have been damaged, keep that in mind. Make sure the phone has enough voltage and current to run.
 
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maluminse

Senior Member
Mar 14, 2011
162
18
Chicago
Redmi K20 / Xiaomi Mi 9T
XDA is awesome. You guys are the best. You may have thwarted an injustice. Saved the files. New lcd heated and I have clamps on it so it seals, hopefully. The frame was slightly bent which was making it hard to keepit on. Im on the home stretch I think.

edit: What to do with an old lcd...

Next project - unbricking an lg stylo 4 with the ch.co message.
 
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  • 2
    Like you have to try - blind shot. Usb mouse and usb c usb adapter. Slide down notification and try clicking.
    1
    You destroyed lcd, so replace it or use o Mouse with otg usb c adapter and try to change connection to file transfer
    1
    The important thing is you're ok. Lol, all my bikes are worth more than my phone... I hope yours isn't too damaged.

    Try disconnect/reconnecting the battery and reboot; a hard reboot.
    If you're lucky a ribbon connector, or ground pathway was displaced.

    Either the display is damaged and/or the mobo.
    The BGA chipsets can't have their solder joints inspected and even finding visible solder cracks is difficult on surface mount components. High G impacts and excessive flexing can internally damage chipsets, solder joints and multilayered PCBs.

    A damaged lcd will flicker, not respond and go black? The glass is not cracked or broken.

    The glass and digitizer are one piece it appears.


    So far Ive found no ribbons disconnected. Ive inspected as close I can all visible connections. Nothing stands out.

    A lcd arrives tomorrow. So well see if I get a response when I plug it in...
    1
    Like tv, if you punch lcd it won't shatter, the crystal will flood or it just flicker, so yes it doesn't have to be damaged visibly to be broken
    1
    A damaged lcd will flicker, not respond and go black? The glass is not cracked or broken.

    The glass and digitizer are one piece it appears.


    So far Ive found no ribbons disconnected. Ive inspected as close I can all visible connections. Nothing stands out.

    A lcd arrives tomorrow. So well see if I get a response when I plug it in...
    The battery may have been damaged, keep that in mind. Make sure the phone has enough voltage and current to run.