red light is "constant" on my computer tower

[cottonbud]

I am running xp pro and booted up, (computer was working fine previously) all the hard drives etc are detected, no problems with anything there, then the screen goes grey and i wait for the user screen, but the screen just stays grey and the red light on the tower is constantly red, no flashing at all. I rebooted and tried to start in safe mode, got to the screen that says start in safe mode (i am attempting to do a system restore) but again the next thing that happens is constant red light and grey screen, any sensible suggestions on this problem - could it be a loose cable problem?, computer sounds fine when starting up and as it is finding all drives etc i am at a bit of loss as to what to do as i cant get past this grey screen, therefore cannot mend whatever the problem is, many thanks for anyones help on this.

[garfield]

sounds like your hard drive might of failed to test this put your windows disc in cd/dvd drive and boot to it you can attempt a system restore /repair from there and this should tell you if you have a hard drive problem.

hope this helps. garfield