A few days ago my cat jumped onto my computer and the side fell off. The computer turned off but when I restarted it turned back on. A little bit later I had to turn it off again but now it won't turn back on. The monitor is on and displaying a windows xp logo but the computer won't turn on or off. I also tried unplugging the computer but that doesn't do anything either. Also, I'm having trouble putting the side back on...

The monitor is on and displaying a windows xp logo but the computer won't turn on or off. I also tried unplugging the computer but that doesn't do anything either.

What do you mean unplugging does not do anything?

Note Google: stuck on XP screen

Try reseat the CPU, RAM and remove mainbaord battery for a few minutes.

hope this helps!
Bill
Tech Manager (WPTinc)

I advise against reseating the CPU or RAM at this time - especially the CPU. If the CPU was bad or not seated correctly, you would not get as far as you get - plus, reseating the CPU involves MAJOR risks, cautions about should have been offered with the suggestion! Removing the heatsink fan assembly can be a challenge in itself. The TIM would need cleaning and a fresh layer applied. Power needs to be removed and ESD is a MAJOR, MAJOR concern - as it is with RAM.

Resetting the BIOS may be helpful - but again - requires precautions to prevent further damage.

Let's wait for the OP to return before offering any more advice - especially advice that comes with significant risks.