Help needed with Biostar Tforcce 6100-939 build

[goreblast]

Setting up system with components that are knwon to work in other systems.

Motherboard is Tforce 6100-939 A01 Ver:1.0

When you power it on the CPU fan spins and the power LED lights. That is it. The four red LEDs on the board light up like

OFF OFF ON ON

I have tried different CPU, both Opterons - could that be the problem?
Two different types of RAM, bh-5 and OCZ 4200 EL, both one stick and both sticks in al slots.
Tried with PCI-E graphics card and on board graphics.
With hard drive and CD-rom disconnecfed - both IDE.
Havent tried a different PSU - this is a new FSP ZEN silent 300W - has the 24 pin power connector. More than enough for this computer. I have a older 20pin PSU I could try if you think this may be problem.
I had USB and front pane connectors plugged in, those have been removed.

Any ideas?

Bios might not support Opterons?

Thanks

 

[goreblast]

Well great minds and all that!

The PSU is FSP Sparkle FSP300-60GNF Zen Noiseless 300W ATX2.0 PSU (CA-007-SK). Its a HTPC in the lounge, so gotta be quiet.

Tried both an Opteron 144 and Opteron 165.

Will try out of the case.
I have a 3500+ here, but will have to remove it from wifes system and put a different CPU (opteron) in it. Gotta check Abit AV8 bios......