hello guys, my friend has a pc that is a 3.0 dual core, 1 gb ram(800bus), 160gb harddisk, intel 965 chipset asus mobo, 400watt non brand psu(15amp on 12V railing). he is using integrated graphics chip of the mobo. Today he got a problem. When he starts the pc only the power led kept on. processor fan is ok. monitor's led is beeping(like it beeps when the pc is shutdown). I guess its a psu problem. Can u guys help out to diagnosis the problem? thanks