help pls, no boot, no post

[simsim76]

i am building my pc. it features:
1.5 ghz/256 L2/400 fsb/ soc 478
423/478 cpu converter
intel board 850GB chipset . socket type (423 pin)
256 mb rambus rim(kingston)

there is power going to the board because the green light comes on when i power it.

The cpu fan is not running, i tried all other headers

the system doesn't boot or post at all!!!

help anybody!!

[golfcart]

is the 'clear cmos' jumper in the right spot?

[simsim76]

yes.....All the jumpers are in the right place.
i thought it is the motherboard and i replaced it with a new one and still didn't work...
now i think it is either the cpu or the adapter......

[gjwilson]

simsim76 this sounds exactly like the board I`m working on. Mine turned out to be the CMOS jumper in the 'clear" position. I put mine in "Norm" position and it took off. Other possibilities are a bad PS or a PS connector not in tight, a bad stick of memory will also do this remove and re-seat it to make sure, remove and re-seat the CPU..same with the adapter if you have one......if I think of more I`ll write back.

[simsim76]

i did reseat everything and made sure all jumpers are in the right position.....what is really strange that the CPU fan doesn't fire up,
i thought atleast the fan should start.
question :if the CPU or the adapter is bad, could the fan not start?

[billniceguy]

fan shud start as plugged into motherboard...check temp in cmos

[magwel]

Sounds like your motherboard may be grounded somewhere. Try booting outside of the case on a nonmetalic surface ( Antistatic bage will be a good surface).

Good Luck

[simsim76]

nope....that didn't wrork neither...

[stroyal]

I have a tyan board that did that, (power light on board and nothing else)with one power supply.
That power supply worker in every other board I tried it on, but would not run that tyan board

edit: now that Ithink about it, I could start the board with that power supply if I shorted out 2 wires in the ATX power plug, but if you tried to reboot it would shut down.