Motherboard doing strange things --> powers down right after post

[srvblues00]

I have an unknown socket 370 Gateway board with the 815 chipset. I finally got a CPU for it today, it's a PIII 700. I put the CPU in, found a jumper to jump the power switch pins, plugged a 250watt PSU on the board, and fired it up. Oh yeah, also a 32mb PC100 DIMM is in there too. Well, as soon as the monitor detects a signal, the board goes dead. It just powers off. I have tried this board using the onboard video, a PCI video card, and an AGP video card. I have also tried another PIII cpu from my uncle's computer. I know the CPU is good because I tested it in my uncle's computer.. I've tried resetting the BIOS via the pins/jumpers on the board, but that didn't help. Also tried different RAM as well as difference RAM slots. If i don't put any RAM in the board, it will power up, beep 3 times as expected, monitor recieves a signal, and then the board powers off. Also, I have tried a diferent power supply. Any ideas? I'm stumped!!

 

[TheGrandHooHa]

It would appear that the motherboard itself is bad... but get some other opinions here first, as I am not totally sure.

 

[srvblues00]

yeah, that's kinda what i was thinking, but i was hoping it's not the case.. hopefully someone will have some ideas.

 

[srvblues00]

anyone? bad board?

 

[andalas]

I experienced those type of problem a couple years ago and I RMA the board and the problem was solved.

 

[DARRIN]

Make sure you have the cpu fan plugged into the cpu fan header on the motherboard. Some motherboards are made to not turn on unless it sees a fan on the cpu fan connector on the motherboard.

 

[srvblues00]

<< Make sure you have the cpu fan plugged into the cpu fan header on the motherboard. Some motherboards are made to not turn on unless it sees a fan on the cpu fan connector on the motherboard. >>



Very good point, I'll check that. I thought of that last night, but there was only one fan header close enough for the fan wires to reach, so I assumed that was the one. I'll pay closer attention to that and see if there's something I overlooked. Thanks!