Which PC part is broken?

[FuckaNinja]

When I turn my pc on, the monitor just stays blank and nothing boots up. I think it might be the motherboard but I'm not sure, all the other parts seem to work. What could be the problem?

[Loogaroo]

Is this an old PC? What have you tried to diagnose the problem? Did you do anything between the time it last worked and when it broke? Does the computer stay on while displaying nothing?

Be more descriptive.

[FuckaNinja]

No the pc isn't old. I tried switching out the ram, psu, and hdd so I don't think it's any of those. At first it just blue screened and kept restarting, but after I switched out the ram it just doesn't boot up. Yes the computer stays on while displaying nothing. the fans spin and everything and it looks normal but nothing happens. I tried starting it without ram sticks in and
I didn't hear any beeps. I think it's either the motherboard or the cpu, but I don't have any way to test those.

[Loogaroo]

Is the cpu power plug plugged in?

[Chryseus]

Try clear the cmos memory.

1. Turn off
2. Remove battery
3. Short power supply rails to ensure all the capacitors are discharged
4. Move cmos jumper to clear
5. Wait 15 minutes
6. Reset jumper and reinstall battery
7. Boot

[FuckaNinja]

[QUOTE=waxrock;36609775]Is the cpu power plug plugged in?[/QUOTE]

I think so, the cpu fan spins. It must be a failed component because I haven't opened the pc in months and it's worked fine.

[editline]4th July 2012[/editline]

[QUOTE=Chryseus;36611315]Try clear the cmos memory.

1. Turn off
2. Remove battery
3. Short power supply rails to ensure all the capacitors are discharged
4. Move cmos jumper to clear
5. Wait 15 minutes
6. Reset jumper and reinstall battery
7. Boot[/QUOTE]

I don't know what any of that is.

[Drumdevil]

[QUOTE=Chryseus;36611315]Try clear the cmos memory.

1. Turn off
2. Remove battery
3. Short power supply rails to ensure all the capacitors are discharged
4. Move cmos jumper to clear
5. Wait 15 minutes
6. Reset jumper and reinstall battery
7. Boot[/QUOTE]

No

1. Turn off computer.
2. Disconnect power.
3. Press on/off switch to get rid of residual current.
4. Move CMOS jumper to clear for 2 seconds.
5. Move CMOS jumper back to parked position.

- Can't find CMOS jumper? -

1. Turn off computer.
2. Disconnect power.
3. Press on/off switch to get rid of residual current.
4. Remove CMOS battery for 1 minute.
5. Put back CMOS battery.

I advice the OP to go with option 2.

it is this battery:

[img]http://static.commentcamarche.net/en.kioskea.net/faq/images/625-cmos-batt1-s-.png[/img]

Remove it like this:

[img]http://ww2.justanswer.com/uploads/jnayes/2011-03-09_042934_battery9ul.jpg[/img]

[Chryseus]

[QUOTE=Drumdevil;36632158]No
1. Turn off computer.
2. Disconnect power.
3. Press on/off switch to get rid of residual current.
4. Move CMOS jumper to clear for 2 seconds.
5. Move CMOS jumper back to parked position.

- Can't find CMOS jumper? -

1. Turn off computer.
2. Disconnect power.
3. Press on/off switch to get rid of residual current.
4. Remove CMOS battery for 1 minute.
5. Put back CMOS battery.[/quote]

Either way works.

[Drumdevil]

[QUOTE=Chryseus;36667489]Either way works.[/QUOTE]

Short power supply rails? Wait 15 mins?
Rate people dumb because they don't know how to reset a BIOS while they came here for help in the first place?

[Chryseus]

[QUOTE=Drumdevil;36676822]Short power supply rails? Wait 15 mins?[/QUOTE]

The goal is to make sure that all the capacitors are discharged.
15 minutes is probably a bit long for most, however I have seen computers (mostly older ones) that need a longer period of time to fully clear the CMOS.