How old is computer? How long have you been having this "freeze"?
Just once in awile at 1st & then gradulally have gotten worse?
Your CPU Heatsink & Fan Assembly is probably clogged with dust & causing CPU Temp Power Down. . . .Cool air has to blow down into the heatsink and blow out the sides & eventually out the back of PC. . .power supply fans are working ?? should be 2 . .
Clean Heatsink and fan assembly & reseat Video card . . . if it has a fan . . .clean it also. . .
Do you have have a PC Probe Monitor utility installed that will measure Temp & voltages in Windows?? If you have CD for your motherboard . . .Browse thru that & look for a measuring utility...Install and monitor
I think that was "Root Cause" of your original problem . . . What do you mean by a power surge?? Your 350 Watt supply was probably ok & might still be good to use, if you still have it. . . .did you have it replaced by 450 watt??
What all has been replaced? Did your Tech have to remove motherboard to replace Power Unit . . .Did it ever work after Power supply was replaced??
I would look over the PC very closely & look for wires / power plugs hanging loose. . .
Is PC working or not?? That constant whistle was probably temp warning . . . try cleaning PC. . . if ~ 2 years old . . . it is about the right time. . .do all your fans work especially CPU. . .check to see if it is plugged in . . .this would sound alarm . . .
Edited by Jack123, 23 July 2005 - 10:07 PM.