motherboard doa

[The Mack]

have just this morning taken delivery of an Abit AB9 Pro
e4300, freezer 7,cooler built it and wont power on when i press on off button no cpu fan of course i have plugged in the cpu power the square block of four and the main power (old style power supply missing the last four holes) i belive this is ok as it is a 550 watt psu.
Any good ideas would cheer me up
thanks

[aurora83]

These may sound really obvious, I'm not saying your stupid, I've made these mistakes in the past.

The switch on the PSU is turned on (if it has one)

Wires from the case switch are connected the right way round on the mobo pins

Are there any led's lit on the mobo

Is there any way the mobo could be shorting itself

Try the psu on another PC

[The Mack]

i am quite experienced 20 ish builds + partial upgrades since p200's
the psu is 100% working from a64 build. however it has only 20 holes not the 20+4 if you know what i mean. there is a small red led that is lit. and the diag led say 2 then go quickly to "00"
tried the power conector both ways around
removed both ram sticks
and all 3 hard drives
gutted i was so up for a bit of 3dmark today

[The Mack]

thanks

[aurora83]

Try a 20 to 24 pin psu adapter, which should be fine as you have a 550w. Although, make sure you have enough amps on the 12v rail.

You can get one for �2.99 at Maplin :-)

[The Mack]

thanks for getting involved mate.
you wont expect this. sorted last night when i tried to clear the cmos with the jumper. i was tired and frustrated and pulled it off with power connected and changed its position. instantly the computer started. the cmos is in reset position by default. duhh??
tech support at yoyotech next to useless and got even worse when i was put through to more senior guy.
i also started to suspect power supply after browsing intel site. and was worrying i had ruined the chip
Once again cheers

[aurora83]

no problem, glad you sorted it.

cmos in reset, that is dumb!