Hi,
I'm working with tis motherboard that have no image.

Operating system loads well from Hd or bootable usb.

Image is missing from laptop lcd or external conectors.

All voltages seems to be good, but PGOOD signal from tps51518 is high for one second, and then drops to zero.

TPS51518 feeds to vga chip with 1.005 volts, and seems a good voltage.

PGOOD goes to a pin of PCH, and some other circuits. (no schematic, only boardview)

As a reference for the TPS51518, you can see the Compal QAWGH LA-8611P r0.1. (it seems almost identical)

Any hint will be appreciated.

Regards.

skoree vsego GPU defekt.

But gpu power is correct, I think:



Could be possible gpu takes so much current that makes PGOOD signal go to low level?

removes the solder pj802 and pj803 and remeasures the pgood to see if it no longer varies the voltage