820-2915 pulsing

[MDY]

820-2915 reboot each 6 seg.
With RAM Cpu core present but each 6 seg dissaper for 1 seg
Without RAM cpu core always present.

Any idea? It is not liquide damage board.

Just talked with the customer. He worked with the laptop and shut it down and next day turn on wihtout image.

 

[dukefawks]

Heat up GPU and try again.

 

[MDY]

Already tried that and no results. Black screen. Gpu 0005

 

[dukefawks]

Apple refurb board with no serial number sticker on RAM slot?

 

[MDY]

Yes, has sticker on RAm and DC is 1144 on 0005

 

[dukefawks]

Could be anything really. I suspect bad GPU or CPU or BIOS. Or the customer is lying and something else happened.