Asus g751jy rev 2.5 no power to DGPU

[myth77]

The laptop starts, no picture, fans at max after 5 seconds...reprogrammed main bios with 2 dumps i found, but that didnt help.

U9402-gpu bios-no voltage on all pins except 3v3_Aon only 0.1V,
no voltage to DGPU_PWRON_MAIN,
0.1v on 3v3_aon net,
no voltage to 3v3_main net,
no voltage to +nvvdd,
on +3vs i have 3 volts,
on +3vs_sys i have 3 volts,

so where to check next? the boardview attached.

thank you all.

[caspian]

Re: Asus g751jy rev 2.5 no power to DGPU

are CPU voltages present?
is there any chip getting hot?

[myth77]

Re: Asus g751jy rev 2.5 no power to DGPU

yes, all cpu voltages present. No chip getting hot.