Hai friends iam.new to this site ineed some help

[ilaranjith]

Hai friends iam.new to this site ineed some help i have lenovo g470 laptop problem is when we press power button lights on.and off in 2 secno display nothing in dc supply machine there is ampears showing 12 only and all voltages are good fine and before power on susp voktahe is 3.0 k amd when we press power button it is going to 0v and i flashe the ec and main bios still same problem plz help me out

[ilaranjith]

Re: Hai friends iam.new to this site ineed some help

I schematic when i checked near q111 and q110 +3VALW TO +3VS and +5VALW TO +5VS in this page before power on q111 and q110 gate side susp is ok 3.0 and there is no voltage on drains side +vsb voltages amd when we press power button this susp is going 0v and +vsb is 20v ok plz help me what is the problem is this