820-2914 Powers on but No chime and no image

[corona2640]

I have a 820-2914-A that has liquid damage, i tried ultrasonic cleaning with no luck, it powers up but no image at all including no backlight, and no chime. When an optical mouse is plugged in it lights up but only for a fraction of a second and goes off. Any advice would be great.

 

[supamodz]

Check cpu vcore voltage report back readings. Also Check if you have external video display.

 

[corona2640]

No image on external display. I checked for for cpu vcore and did not see any voltage but where is a good spot to test for this? I’m new at this. I checked around the ud300 area.

 

[dukefawks]

Check in L7510 for Vcore. Check if ALL_SYS_PWRGD is present. Where was the corrosion?