Desktop PC (Monitor) Won't Boot, MOBO Doesn't Beep, But HDD and Fans Spin

Here is my suggestion for your problem:

1 To clarify things, dissconect all the components in your PC from the motherboard.

Those are: RAM sticks , the graphics card , all HDD/CD-ROM cables, leaving only the power supply cables on the motherboard

. (this is your buzzer)

If the PC turns on, try adding one component at a time to identify the problem.

Before you go to the next step, consider replacing the power supply with a known good one, because a faulty power supply may cause the problem.

2 If it doesn't turn on, dissconect the PSU from the wall, remove the CMOS battery and hold the power button for one minute.Then connect the power supply to the wall and try to turn it on.

3 If the PC still doesn't beep, your motherboard may be the problem.To check if that is true, press with your thumb on the northbridge/chipset on your motherboard. While you hold your thumb over it not too hard (just enough), try to press the power button to turn it on.

If the pc turns on, your chipset solder is bad .In this case, contact a service or replace the motherboard.

Hope this helped you.