7 inch touchscreen display is completely dark wont turn on

i had to reinstall after it crashed trying to do apt-get upgrade and after that i put sd card in power on and nothing happens red light stays on with a blinking green light as well any assistance with figuring out why the touchscreen wont turn on plus fixing the apt upgrade issue, im aware i have to install the complete version before initiating the upgrade command but when i run that command it says theres no version in the repository... ?

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0 hugohu over 5 years ago

You... don't need the jumper wires.... except for the red and black ones...

I mean technically you could just use the red one and not even use the black one.

Unplug the green and yellow ones from the board. It may be because the FAN SHIM is using those pins.

Also hold your DSI cable to the light to see if there are any cracks in the line. If so it's probably broken and you'll need to replace/
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0 onegoodeye over 5 years ago in reply to hugohu

"I mean technically you could just use the red one and not even use the black one."

Are you saying the power return voltage should find it's own way back ? maybe through screws and signal ground which a both inappropriate for power.
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0 onegoodeye over 5 years ago in reply to hugohu

"I mean technically you could just use the red one and not even use the black one."

Are you saying the power return voltage should find it's own way back ? maybe through screws and signal ground which a both inappropriate for power.
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0 hugohu over 5 years ago in reply to onegoodeye

I think the DSI cable provides ground.
at least it works for me.
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