OK, I've got a bit of a predicament here, and I'm not sure exactly what could be going on, or what the culprit is. Yesterday, I moved, shut down my computer, it was working OK (old and a bit slow by today's standards, but working). Today, not finding where I packed the ATX power cord, I bought another, plugged it in, it won't POST. Swapped that one, with the one on the monitor, and same problem, monitor works fine with it. What it's doing, is that it begins to power up normally, though it never passes off to video, and a couple seconds into the boot, it just powers itself down automatically. On the back (board is an MSI K8N Neo 4), the D-bracket starts off initially red, tried swapping out the gfx card, then it was 2 amber, 2 red), but only gets to the initial part of the boot sequence (first light goes green), which according to MSI's documentation is early chipset initialization. It gets to here, but then powers itself down during this phase. Only thing between working and now, was 1. the move, and 2 looking at the board closely all fans power up normally except for MSI's own fan over I'm going to hazard a guess and say the south bridge chipset, given it's distance from the CPU and RAM (aka it's the lower back end of the board). Why that in and of itself would prevent POST from even getting to the point where it displays video, no idea. Now the board was bought in Sept of 2005, along with the CPU. - MSI K8N Neo 4 - Athlon 64 3500+ - Swiftech CPU cooler (attached with Arctic Silver 3 thermal paste) For 4+ years, worked fine, no incident, no boot errors, nothing of the sort. As to other components - Corsair 2x 512 MB Corsair XMS 400 MHz DDR SDRAM with 2.0 CAS Tried just one stick of memory, other, reseated both, to no avail. - Radeon 9600 AGP (bought in Dec 2004) worked to present (not sure what's the cause of the boot problem however), and on the gfx tried swapping. Placed a Visiontek Radeon 3650 1 GB vid memory in the AGP slot, no dice, the problem remains, though instead of 4 red lights then first went to green, I got 2 red, 2 amber, then it went to chipset initialization. I've tried resetting the CMOS, nope, won't boot. Umm, anyone having any ideas what's going on here, what could be causing this? I also looked, trying to see if something got disconnected in the few miles move, and all the cables look connected. Tried resetting the power cable to the motherboard, nope, no dice. Otherwise, the CPU is a OCZ 500 watt modular PSU, though also bought in 2005, so doubt I could easily get a link from their website anymore. All connections were firmly in place, not removed and re-inserted when I got there, with the exception of what I tried. Felt everything by hand, and all seems well seated/tightly in place, etc - 2x Seagate Cheetah using Ultra160 SCSI bus (yeah, components in here are a bit old), on an Adaptec SCSI card 29160. I'm actually a little flustered at this point trying to figure out what might have happened, especially as I can't find a thing which appears to be wrong, other then the fan on the motherboard not working that is, and the computer shutting itself down during the early stages of POST, where it should be initalizing the chipset. Would a motherboard fan prevent it from POSTing, and if so why only after the move? If not? I'm stumped.