When you turn the computer on, watch the keyboard. There should be three lights for num lock, caps lock and scroll lock. Watch to see if they blink when the computer is turned on. They should blink all together exactly once. If they do, then the computer is going through the power on tests. If they don't, that indicates that the computer isn't getting very far at all in starting. That can be do to power issues, motherboard failure, processor failure, or an extreme memory failure. Most other problems will let it get far enough to blink those lights.
Does the noise start immediately after you turn on the computer, or is there a slight delay?
As for getting the case open, try pulling the front piece off if there are no screws in the back that let you take the cover off when they're removed. There is one brand of cases used by a lot of people who put together good quality computers that has the screws in the front. The front panel varies some, but you should be able to grip it at the bottom and pull it off if that's the type of case you have. I've used a lot of those cases, and it is totally not obvious how they come apart if you don't already know.
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timeasmymeasure
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Date: 2007-03-16 02:30 am (UTC)Does the noise start immediately after you turn on the computer, or is there a slight delay?
As for getting the case open, try pulling the front piece off if there are no screws in the back that let you take the cover off when they're removed. There is one brand of cases used by a lot of people who put together good quality computers that has the screws in the front. The front panel varies some, but you should be able to grip it at the bottom and pull it off if that's the type of case you have. I've used a lot of those cases, and it is totally not obvious how they come apart if you don't already know.