Help! Computer not booting.

[Mcot]

My computer is not booting. This is a brand new build and its the first time im trying to power it on.

The cpu fan spins up, the hard drives spin up, but there is no signal going to the display (on board video).

Also the keyboard does not light up (num lock key) and the optical mouse does not light up either.

There are no post beeps, and there is nothing shorting the motherboard on the case...

My guess is bad cpu, memory, or mobo???

 

[Mcot]

Does the cpu spinning up mean that the mobo is ok?

 

[engiNURD]

I'd re-seat the CPU.

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If you have both the 20/24 pin main ATX connector plugged in, AND the 4-Pin ATX12V P4 CPU connector plugged in, then the board should boot fine.

You could test the PSU. Jump start it (on the main atx connector, short the green wire with any black wire, using a paperclip), and see if it stays on. If not, then its probably a faulty PSU. If it works then proceed (though, in rare cases, it may still be the PSU at fault).

Setup everything outside of the case, with the mobo on top of its cardboard box. Plug in only the essentials:
- PSU (namely: main 20/24-pin ATX connector and 4-pin ATX12V P4 CPU Connector)
- CPU w/ HSF
- Single stick of ram
- Videocard if there is no onboard video
- Monitor
- Keyboard
- System speaker/buzzer

* Use a screwdriver if your board doesnt have an onboard power switch. Jump the two power switch leads to turn the power on.

If it won't POST, try different RAM slots. If it still won't POST, pull out the ram (so no ram in the system) and listen for error beeps. If none, pull the vidcard and listen for error beeps. If none, re-seat the CPU/HSF and try again. Report back with results if you're still having issues.
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[DrDoU]

does your motherboard have a four pin power supply for the cpu that runs from the power supply itself?