Last night i cleaned my pc by taking off a lot of dust. i disassemble it, processor, processor fan, heat sink, video card (heat sink and fan) hard disk and i even replaced the head sink paste. i used to do that once in a while, about twice a year or if i have spare time. everything are ok then but last night was a nightmare. i've already tried what dogbreath077 has said on this forum and even ask my friends, but nothing seems to be going on my favor. Nothing appears but the floating no video input. Does this mean that the motherboard is already the problem? PLEASE HELP!
Make sure all cables and devices are properly installed.
Remove video card and use onboard video.
Replace VGA cable.
Jumper reset and take off the motherboard battery. (Desperate move)