Problem with my P.C

[daleke]

I have been having major problems with my p.c which no one seems to be able to fix.It started by crashing EVERY day.I replaced the Mother board,the fan the graphics card,the sound card one by one to find no difference.I bought a new tower and had my Hard drive checked,THEN it stopped crashing and now I have two problems. 1...It runs for 10 or 20 minutes and then the screen suddenly freezes.You can not move the mouse pointer or make anything happen via the keyboard.Only option is to hold in the start button on the front of the tower untill it switches off. Then you have to start again.
Second problem is every now and then while it decides to work I get a siren type sound coming from the tower.(not the speakers) Its like a high note then a low note,just like a police siren.PLEASE somebody HELP me.Dave

[Ethel]

I found this - could it be your problem?

Your cpu is overheating and the siren is the bios overheat warning. If you didn't shut down immediately you may have fried your cpu. The cpu cooling fan may have failed or become unplugged. If you built this pc yourself you may have misinstalled the heatsink. On amd cpus it is easy to put the heatsink on backward leaving the die unconnected to the heatsink.

[daleke]

Thanks but the trouble is ....if I close it down and restart ,it can go 1 hour or 10 minutes or not at all if the freeze comes first.Pc world (ny the way) tell me its a warning saying something is not correctly plugged into the motherboard,but nothing is any different from twwo days ago when it did not do it apart from a new sound card which works fine so I cant see that that is what it is.Dave

[dodgyshirt]

You appear to have provided the answer to your own question.
Unplug the sound card and check if the fault is still present.
If this cures the problem then reseat or replace the new sound card.
I have come acros this situation before where a seemingly OK sound card has caused the PC to crash. Replacing it solved the problem.

[daleke]

Thanks,I will try that.In the mean time things have got worse as the pc will now only run in safe mode.When you switch on it gets to the screen where it says windows xp ,then goes black and stays that way.I am close to giving up on this machine.Dave