I received a pc to look at with no power, I replaced the psu but still no response at all, disconnected the power switch and shorted across the mobo connections but still no power. I concluded it must be a problem with the mobo so replaced it and the cpu but still no sign of life from the pc. I then tried the old mobo, psu and memory out of the case but still no signs of life. Tried some other memory but still the same.I shall try the same with the new mobo but am not hopeful. Have any of you guys any suggestions?