I moved my three-year-old desktop (3.2 GHz processor, Asus m/b) into another room while I was cleaning my office, and now when I try to reconnect it, it won’t POST. I can hear everything power up (drives, etc.), the m/b light is on, all the fans are running (incl. video card), but no beep. No output to monitor. It just sits there with fans spinning. The machine was working perfectly fine before this (and very reliably) so while I know a “no-POST” is often a sign of a dead m/b, I’m not sure why it would happen right now. (I didn’t drop the machine or anything. I don’t remember any static discharge.)
I had a similar problem with an old, old machine about 9 years ago where it wouldn’t POST for a while after you unplugged it. Someone suggested this was due to a dead CMOS battery but my understanding is that would just fail to save your BIOS settings, not fail to POST entirely. But on this one I tried replacing the battery, and it didn’t help.
I guess there could be a short due to having picked up the case and moved something around, but wouldn’t the m/b light fail to come on in that case? CPU came unseated - unlikely? Any other thoughts or suggestions?