I just booted up my computer and got one of it's random oddities. Every few weeks/months I boot it up and I get 9 long beeps then the power gets cut and it reboots and everything is fine. Any ideas?
Edit: One of my friends said it's the computer clearing out the cashe or something like that but I don't really trust him on that
Beep codes vary between BIOS manufacturer and motherboard manufacturer. On an AMI BIOS (it should say on the POST screen what kind of BIOS you have: usually AMI, Phoenix, or Award), 9 beeps usually means the BIOS ROM didn't read correctly. The other kinds of BIOS don't have a straight 9-beep code documented.
If it only does this occasionally, and is always stable while it's running, I wouldn't worry about it.
If it gets worse, so that it's doing this frequently, I would try, in order:
* Replacing the CMOS battery (it's the coin-shaped battery on the motherboard).
* Reflashing the BIOS, with the latest BIOS from the computer maker or the motherboard maker. This will rewrite the ROM and set all the bits to solid ones and zeros (or so we hope).
* Changing out the power supply, using a known good one. (Power problems at startup can cause a lot of consequential errors.)
If nothing else works, and the computer is not under warranty, you may have to replace the motherboard.