tcampbell34
Member
U9850 is dead and needs to be changed.
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820-01700 No display
- Thread starter Zebulon
- Start date
Looks like GPU problem, if you get bad resolution on external monitor.
VRAM issue also possible.
After login, machine tries to load GPU driver and then problem appears.
Heat the GPU/VRAM with quality flux; no more than 200 degrees, 15-20s.
If still the same, you can pass the board through ultrasonic bath too.
Inspect first for corroded resistors on GPU area.
BTW, do you get 3V3/5V_S0SW_LCD, at least in the first few seconds?
Check when you hear the chime...
VRAM issue also possible.
After login, machine tries to load GPU driver and then problem appears.
Heat the GPU/VRAM with quality flux; no more than 200 degrees, 15-20s.
If still the same, you can pass the board through ultrasonic bath too.
Inspect first for corroded resistors on GPU area.
BTW, do you get 3V3/5V_S0SW_LCD, at least in the first few seconds?
Check when you hear the chime...