My computer is an G4, 533mhz, <1gb of ram, 8-9 years old, OS 9 & 10.3.9. Last night I was on youtube watching videos, not uploading, not downloading, or doing anything else on the computer that would cause any strain on it. It froze (mouse and everything) and started making a *clanka-clanka* noise, not from the speakers, from inside the tower. I tried to restart using the little restart button, but it didn't work. I finally held down the power button for a few seconds, turned it off, and went to bed. The next morning, when the computer was turned on it's screen went to that purplish-blue-gray OS 9 color, with a picture of a yellow folder with the OS 9 smiley face which blinked into a question mark and back. Holding down X failed to boot it into OS X. Holding down alt brought me to the screen where you should select which OS to boot to, but there were no options. Just the arrow to continue, and the refresh button, which didn't do anything. We don't do anything "risky" with the computer (torrents, cracks, warez, porn, etc.), so I'm guessing it's a problem with the hardware. Is it time for a new computer?