HELP HELP System Starts up, bu i get no signal on VGA, no beeps

[imported_gybp]

Hi, i built this system:
Asus p5b-plus vista
2x1gb kingston value
seagate 320Gb
ati 2600PRO
Coolermaster REalpower 450W
Intel E6300 stock cooler

The system starts, everything seems to be fine but the bios doesnt show up, i get no signal through the vga output, i tried 3 gfx cards, that doesnt seem to be the problem.

i think that the motherboard bios does not support the cpu, how can i update the bios without seeing anything on the monitor?

what do you think is the problem???

 

[SerpentRoyal]

Is this a clean HDD? Did you reset the CMOS? What is the speed of RAM?

 

[imported_gybp]

yes, is a new HDD, ram speed is 667

 

[SerpentRoyal]

Brand of RAM? Is memory rated at 1.8V per JEDEC standard? Disconnect power from PSU and remove battery. Clear CMOS and wait 1 hour. Replace battery and jumper. Boot with one stick of RAM.

You should take the MB outside of the case and put it on a non-conductive surface. Strip the board bare, including CPU and RAM. Install only CPU, RAM, mouse, keyboard, and GPU.