Imac g3 weird pinching

[sevenhundred]

So I got an iMac g3 dv ruby(can’t get photos since I’m out of town) 450mhz running Mac OS X 10.4.11. I ugraded it and did nothing much to it for a while, I booted it up one day since I got a external cd drive for it and wanted to test it out, I tried some games and most didn’t work, ( all old edutainment cds) and when I get ready to unplug boom, computer starts freaking out. I turn it off then boot it back up, all looks fine although then I notice it, the sides of the screen are pinching inwards slightly, and the settings do nothing to fix it. What should I do to fix it?

 

[tensixturtle]

You would probably get more replies in the PowerPC forum: https://forums.macrumors.com/forums/powerpc-macs.145/

Good luck.