hello,
i have hp dv5 intel no power stdby +3v and 5V are okay .when press power switch the power led flicker .I have noticed that the signal mainon from system micom not switching the power planes for load mosfets pq32,pq25,pq22.the sus_on and sus_s5 are all ok.I have changed the system micom and fresh bios still same problem no mainon at PQ32.no shorting ahead.where can the problem be.

maybe problem in - dnbswon#1, dnbswon#, susb#, susc# or southbridge.