Power supply powers up when I plug in the computer!!

I'm replacing a motherboard for a freind in his Emachine. I've done several motherboard replacements/builds, and I've never encountered this issue....

Put the new board in and plugged in the PSU to both of the mobo connections, the 20 pin and the 4 pin. Connected the front panel connectors (pwr switch, hdd led, & pwr led) thinking all is well, I plug the power chord in and the powers supply fires up, along with the CPU fan!?!? I never even hit the power button on the front panel yet!! So I hold down the main power button on the front panel, for atleast 5 or 6 secs trying to get it to power off...but it won't!! So I put in another spare, aftermarket PSU I had laying around, that has a power switch on the back of the PSU. Hook up the mobo connectors and plug'er in and boom...same thing!! So I unplug it and turn off the power switch on the back of the PSU...plug the main power chord back in, and ofcourse nothing happens so I flip the PSU power switch, and again...same thing!! I have checked and double checked my front panel connectors...made sure the CPU is in properly and reset the CMOS battery a couple of times now!! And I've even tried a third PSU!!

I have tried to google to see if this is a known issue out there in the geek world, but can't find ANYTHING related to my issue, so I was curious if anyone here has heard of such and can point me in the right direction!!

BTW...The new board is an Intel D865GVHZ, if that helps any!?!?

Roger

 

There is a setting in the bios that does this. its to set whether the computer boots up after a power failure.

Matt

 

Actually I got it...Thanks for the help, though!!

Apparently I wasn't leaving the CMOS battery out for a long enough time, so I took it out for a good ten minutes, and at the same time, just for the hell of it...I also put the cmos jumper on reset...and after all that little bit...It appears to be ok!! I am currently doing a repair install on the OS as we speak!!

Thanks Again

Roger