Pc keeps crashing - HELP

[clarkey01]

My pc keeps making a whistling noise on start up and sometimes just shuts off, I flick the switch off at the back for a few seconds, thne turn it back on and start up and the same thing happens, most of the time, the 2nd start up will be sucessful, but it still makes this whistling sound.

I have sent the manchine in and it didnt happen at thier shop and they could find no wrong with it, However when i get back to my place it does, and when the side pannel is off theres no problem at all. Fans are clean and I cant THINK OF ANYTHING it could be.

Help me I beg ;-(

 

[CraigRT]

leave the side off?

 

[clarkey01]

I dont feel safe with it off

 

[CraigRT]

maybe your case intrusion protection (if it has it) is going all whack.. i really dont know....

 

[warcrow]

That a good guess Craig....other than that...I dont know either.

 

[clarkey01]

Its about 2 and a half years old. 2000 xp, 512 DDR ram, FX 5600 256MB, 80 gig HD.

Its driving me insane, I might have to fork out for a new tower if this carries on.

 

[w00t]

must be bad airflow. you say it works correctly with side panel off. so its cooling problem imo

 

[clarkey01]

but once i leave my pc on for hours its fine, under full load its fine, but rite at start up it crashes, it seems fine if you can get past start up.