820-3332 Cycling.

[bjf]

No liquid damage. Board is cycling with fan up and down. Screen is coming on for a split second. Reflowed and resoldered U8900. No change. Replaced U8900 just to see if that might matter. No change. Is there any other direction to go with this board?

 

[dukefawks]

So the backlight does come on? Does it chime too? Still shuts down without LCD connected?

 

[bjf]

Yes, it chimes, and yes, it still cycles with nothing connected.

 

[dukefawks]

Never seen that before. Could be BIOS, try that first. Any other history on this one?

 

[bjf]

I switched the BIOS. No change. Still up and down. Chimes and then restarts. No history on it. No liquid-spill. I'm stuck.

 

[dukefawks]

I also have no other ideas, it could be pretty much anything, sorry.