Yellow lines and some purple around the screen, and freezing, help?!

hi i have an iMac G4 First generation, and lately, the computer has been malfunctioning in the strangest way;
its been either crashing and freezing up, OR invaded by yellow and orange lines all around the screen... i tried a clean install of system software and still no luck at all. i took out the extra ram that was in there, and still hasnt worked. yellow and orange still appears around the screen, and sometimes, the mouse seems to have black bars forming a square shape over it.
please help if anyone can. i would love to find a solution available that doesnt involve having to bring it in and replace hardware, however, i know that it is probably unlikely to be able to
these yellow marks around the screen are frightening!
thanks!
hope someone can help me
imac G4 Mac OS X (10.4) 1st generation, superdrive

Hello Blake:
Read the information from Apple below and see if it applies:
http://www.apple.com/support/imac/repairextensionprogram/
Barry
Edit: Oops, sorry Blake - that applies to G5's. I would take your G4 to either an Apple store or an Apple certified technician.
Message was edited by: Barry Hemphill (correcting information)

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