Hello to all,
i have an asus ux303u that freezed mid-work, than from there it booted only into bios and failed to detect ssd. The +5VS_HDD and +3V_HDD were missing because +5VS and +3VS were missing too. I saw they're created from +5VSUS and +3WA_DSW (both OK) through gate enabling signals generated from +12VS (that was missing) . On the PQ8807 the +12VS is generated from +12VSUS (measured 14,20V), P_LS_12VS_EN_10 (measured 14V) and SUSB_EC# (0 volts). I thought that the problem was on the U3001 (an IT8995VG) that were not creating the SUSB_EC# signal, but before i could do other measurings...

Hello to all. My name is Sabatino Finiuccio and i'm from Italy. I like to do basic electronic repairs in my (less and less) spare time. Sorry for my broken english, but at least is better than my repair skills... Thank you in advance for all the informations you shared on this forum. I'm sure they'll be very helpful. Saluti dall'Italia