Please Help.

HI, Can anyone please help me. When I turn on my computer a siren noise starts up. It used to stop when windows loaded but has started getting worse and is just on constantly. Sometimes it stops when I restart a couple of times. My fans seem to be working fine. Does anyone have any suggestions???? Its really buggin me!!

is it comming from your monitor..? If you have a CRT monitor (tube…not a flatsscreen) then its best you never turn it off. Powering them off and on shortens there life.

Hi, No, its coming from inside the CPU. The bottom of it i think

You'll need to open the box and try to localize it. Many video cards have attached fans, and that would be one place to look. Power supplies can make a whining noise too.

Cany see exactly where its coming from but did open it up and its coming from the card right at the bottom.

If that is the same place the monitor plugs into, then that would be the video card. Many video cards have built-on fans, and if dust or debris has gotten into the fan, or if the fan is failing, it could be making that noise. You will need to remove the card to physically inspect it. Blow out any dust and dirt, then reinstall being sure nothing is intruding into the fan.

Think it may be that card. What does the fan look like? cant see anything that looks like a fan

Depends on exactly what video card it is. In general, the fan will be 1-2 inches square and quite thin. It should be obvious once the card is out of the machine.

One way to confirm if it is that fan is to temporarily block the fan from turning. Reinstall the card and reboot the machine. If it's quiet you found your source. Don't leave it on for any longer than neccessary or the video card may overheat.