New system won't boot into BIOS

[liamm]

Hi, building my first new system for a few years but am having some problems. I have the following kit:
AMD Phenom II X4 Quad Core 940 Black Edition 3.0GHz
Asus M3A78-T AMD 790GX (Socket AM2+) PCI-Express DDR2 Motherboard
Antec Sonata III Piano Black Quiet Case - Black (EarthWatts 500W PSU)
Kingston HyperX 4GB (2 X 2GB) DDR2 8500C5 1066MHz Dual Channel Kit (KHX8500D2K24G)
Western Digital Caviar Black 640GB SATA-II 32MB Cache - OEM (WD6401AALS)

Basically, the system won't boot up. When I switch on the power the mobo light comes on and the fans run but I am getting no output to my monitor or any err beep codes.
I have tried removing the memory but still no error codes.

Does anybody have any suggestions or know what the fault could be?

Many thanks in advance,
Liam

 

[Yami]

Have you ensured all power connectors are in? Namely 4- or 8-pin CPU connector, 24-pin power connector (well this obviously is since the mobo light comes on), and graphics card connector(s) if needed.

 

[HAVOC]

What video card are you using?

 

[Yami]

What video card are you using?

I think he's using onboard.

 

[HAVOC]

Can you get into the BIOS?

 

[Hefemeister]

Can you get into the BIOS?

lol take a look at the title of the thread.

Do you have another psu to try? Have you tested your psu with a multimeter to see if it is working? Have you tried with just one stick of ram?

 

[Stevo808]

Is there a speaker in the mobo? If so and there is no post beeps i would suspect a bad mobo. But try re-seating all components and try each ram stick at a time like hefemeister said.