I knocked my tower over when I was reformatting it and now it won't boot. I'm not sure what my BIOS is because it won't get that far anymore but I can tell you this: on powerup, the keyboard lights up, the screen has a Dell bootup screen and the CD-ROM drive and hard drive will start turning. I get two short beeps and no boot. When I remove the USB mouse and PS/2 keyboard I get the normal 1 beep and it boots. In fact if I boot using KNOPPIX, and I plug the kbd and mouse back in as it's booting, then I can use them just fine.
I've taken out the RAM and put it back in but I don't know what else I should do or check. If anyone could point me in the right direction, I'll gladly tongue their earlobe.
I could try reseating the video card. I haven't done this yet. I should mention that I am getting a Dell screen right after hitting the power button so I assume this means the video card is making a connection and functioning.
I pulled out the CMOS battery and put it back in, and it didn't change anything.
I feel like there's something significant about the fact that it boots fine with the mouse and keyboard unplugged, but doesn't boot with them plugged in.
OK here's the solution, in case anyone else has a problem: I changed the configuration jumper so my bios was in maintenance mode. Then I set the BIOS to show the diagnostic screen on boot. Then right when the beep happened an error showed saying that it couldn't find the A drive (this is an old computer). I had recently unplugged the floppy drive since I haven't used a floppy in years.
In the future I'll be more specific about make and model, year etc.