I have a small problem with my pi which has been ongoing, probably for a year now (since I got it).
When my pi is running for any length of time, it beeps for no reason.
Sometimes it will go a long time between beeping, other times not so long.
When it beeps, it is a single, constant beep lasting no more than a second.
This was occurring before when I was running raspbian, and is still happening even though I'm now running raspbmc. It doesn't seem to reboot when it beeps (and nothing visible seems to happen)
This is an earlier revision 1 pi (model B, 256Mb).
Temperature wise, it never gets much above 45C.
This is more of a nuisance then a problem (it occasionally makes my jump when it happens). I have tried searching on google (and on here) before, but only ever seem to pick up posts and threads about how to make the pi beep.
If anybody can come up with any suggestions as to why it happens, or even simply how to stop it, I would be most grateful.