HP 15s-FQ Series / MB: DA0P5HMB8J0 REV: J / Loop turns on and off without video.

[gabrielA7]

When I turn it on, the white LED flashes and then turns off, and it stays like this.

We have 3 and 5V S5 as soon as I start it, then the voltages drop because we don't have the MAIN_ON that originates from IT5570 pin 33.

We don't have a short in the sources.

I re-recorded 2 BIOSes here on the site, which apparently are OK.

Now I would go for the EC IT5570 BIOS, but I couldn't find it anywhere.

What else could I check to make this MAIN_ON pulse appear?

[pc_okay]

Hello friend,

Do you have VCCDSW (coming from +3VPCU) ?
SLP_S5# , 4 and 3 ?