Rebuilt Computer won't boot up..

[jrockfl]

Computer wont boot....Here are the specs...

Intel Celeron 1.7 (known to be working)
New Intel D865GBF MB
New 400 watt ps
256 meg ram 2100

I just disconnect the hard drive, cdrom and took out the memory.

No beeps!

Would it be the mb or ps? Are there any other tests I should do?

[Omardeth]

make sure the cpu fan is pluged into the correct plug on the motherboard . some boards won't boot unless it gets a signal from the motherboard that the cpu fan is working .

[HeadBand]

take it out of the case and boot it might be shorting

also what is the video

EDIT it also needs memory in to boot

[Sixpac_XP]

make sure you have the RAM (memory) in the board or else it won't even post to the bios when booting...

try just the memory, cpu, video card and a keybaord plugged in and see what happens.. make sure the motherboard isn't shorting out with a loose screw caught between it and the case.

[RicheemxX]

other things to check clear the cmos..make sure the jumper is set in the right position if the board has one

make sure you have a video card or on-board video

and yes you must ahve ram in the board to boot

I assume it powers on fine and you are using known working ram and video even if there is on-board video you might try using a video card

[jrockfl]

The mb has onboard video.

I stuck in the 256 known good ram, and then I took it out and dropped in a 512 brand new ram.

No beeps...

I have 9 screws holding it in tight. CPU fan is plugged in correctly.

What next?

[implexant]

sounds like a PSU or Mobo issue to me. just a guess though.

-Chris

[HeadBand]

even if you are sure it is secure take out the mobo and place on a nonconductive surface

[Prison Kids]

You might double check the pin config for the PWR_SW. I once had the same issue with a used mobo, when I pulled up the wrong wiring diagram. Made the changes to the correct pins and it fired right up.

[jrockfl]

It has to be the MB, I swapped it out with a known good and it started to boot up.

How would I clear the CMOS? would this need to be done?

The hard drive makes "looping spinning" sound with this motherboard and not with the known good. I know the hard drive is good.