I have acer aspire the mb is la5911p no power. The main mosfet gate does not go low. And so +B is not enabled.can anyone tell me voltages of signal pacin,acoff,also volages of lm393, .i have changed the dta144eu,dtc115 also mosfet:-)seem to be fine.ic pu1b lm393 have wrong voltages on pins 5,7 are not there the pin7 goes to the d14 which start mainon and acon.pin 6 of lm393 has+3.3v rtcref ok.
Pls help where can the problem be.
Thanks

Hello, don't matter about level of voltages on LM393. You have to verify the resistance of 1,2,3 pins of LM393. Also, you have to verify the voltage divider on PR3 and PR7. If it is serviceable, you have to have about 4.37V on pin 3 (you have to recalculate, because it's approximate calculation). Of course verify voltage level on 2 pin from RTCVREF. If everything is true, and resistance of signal lines are normal, and lm393 is workable, then everyting is good, and pq23 is in working order, everything will work.