Mood:  crushed out

1. Computer turns on but does not start / boot (Power led lit up and turns off, the ATX power supply fan is turning).

a.       There are instances that the ATX power supply is defective. This may be caused by insufficient supply of power to the motherboard (usually the problem when adding hardware to your computer like CD ROM) try changing your ATX PSU to higher wattage (ex: change your 300W ATX PSU to 400W).

b.      Problem happens when you just assembled or set up a brand new clone / generic desktop. Try reinserting the ATX PSU cables, check Motherboard jumpers if set correctly, and check IDE / SATA cables.

c.       The motherboard is defective. Parts in your motherboard get busted, like IC and capacitor.  (Note: Never put your coffee or water on top of the CPU or monitor, this might spill and cause damage.) In this case you need to replace your Motherboard.

(Note: for compatibility of your existing hardware, use same motherboard specifications.)

d.      The reset button could be stuck. Pick with a pointed object like paper clip to release the button.  Never bang the CPU.