My Dell Insprion will not start sometimes. When I push the power button it tries to start and the fans will try to turn. I can get it to start by turning the power strip off and holding the power button on the computer until it glows orange then turning the power strip back on. I have replaced the CMOS battery, I have run the Dell Diagnostics and the motherboard and components checked OK. I have removed and replaced the memory, video card, keyboard, mouse, fans and drives. When I reinstalled each peice one by one the computer would start, but slower each time. I have not tested the power supply yet.