my monitor keeps squeeking intermittently, any ideas whats wrong or is it just being tempramental? it only started a coupleof days ago, and doesn't appear to be triggered by any specific action on my part. :(
I've had a couple of monitors do this, and it seems to indicate that the tube is on its last legs. You should probably start saving up for a new one right away.
Assuming its a CRT monitor not TFT, this stands for Cathode Ray Tube the same as in a normal television. As jenstar said, start saving for a new one,preferably a TFT (Thin Film Transistor) one which have come down dramatically in price and usually have a 3yr guarantee.