Good rig (or at least a functioning one) until I put her in a new case. No boot, no beep, not even the fan--so I figured maybe the motherboard was seated badly, making contact with something it oughtn't.
Out comes the mobo (set outside the case on cardboard) and I strip it down to the essentials: 1 RAM stick & vid card, just to see if I can get it to post. Still nothing. >.<
So I unplug the power and ponder. This is my first time, and I know very little about the mechanical electrical end of computers... so I wasn't pondering much, except what possessed me to do this in the first place *lol*
There are two power inputs on my mobo, a 20-pin and a 4-pin, separately seated. I figured they both needed to be hooked up, but now I wasn't so sure... what made me wonder? The "flag" on the cable for the 4-pin connector which said "For 24-pin motherboards only" (don't hit me! *facepalm*). I mean, there's 24-pins, even if it's 20 in one place and 4 in another, right? Uhm...
Anyhow, right ot wrong, I unplugged the 4-pin connection, plugged the power supply back in... and...
WE GET SIGNAL!
What you say?
Yeahp. The cpu fan came on, the led indicating the mobo was getting power came on, the vidcard fans and lights came on...
But still, no beep, and nothing on the monitor but the self-test bouncey-box. No BIOS.
So... I'm stumped. Does any of this have ANYTHING to do with the 4-pin power connection to the mobo? Oh, and I can't get the case power switch (which I do have connected and--yes--the case speaker too) to turn this puppy off and on... just the power supply switch at the back of the case. I'm missing something obvious here, I know I am... but I have no idea what.
Anyhoo, resetting the CMOS... any ideas in the meantime?
Thanks in advance for any advice!
Bull(ette) in the Mobo China Shoppe
System Type: Desktop PC
OS: WinXP Pro
Power Source: Topower TOP-350SFX 350W
Processor Type: AMD Athlon 64 (Socket 754) 800 MHz
Hard Drive: Maxtor 120 GB ATA
Ram: 1GB (512MB x 2) DDR RAM
Mobo: AOPen Mk89-L w/nvidia chipset
CDRW/DVD ROM 52x32x52
Vid Card: Nvidia GeForce 6800 OC (by BFG)
Edited by Athena's Pet Geek, 16 June 2006 - 12:30 PM.