820-00840 no video but backlight present

TBFix

Member
There are no signs of spillage on the board. I have tried reseating the video cable. The board draws 20v at 640ma. I dumped the bios but meinject tool says theres no me region or me region is corrupt. It make a sound when you plug it in and using a Chipmunk it flashes usb activity. Cpu Also gets hot. Where is the best place to start?.

 
Last edited:

TBFix

Member
Hi thanks for your help but unfortunately its still the same. When charger is plugged in the macbook chimes and backlight comes on. Keyboard caps lock lights up cpu heats and fan spins.
 
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