27" iMac suddenly won't turn on… completely dead? (late 2009 2309) - iMac Intel 27" EMC 2309 and 2374 - iFixit
SOLVED: iMac screen turns funny colors and computer itself freezes. - iMac G5 17" Model A1144 - iFixit
![screen - iMac doesn't start, all i see is colored lines and then checkered lines on a white background - Ask Different screen - iMac doesn't start, all i see is colored lines and then checkered lines on a white background - Ask Different](https://i.stack.imgur.com/hkV9a.jpg)
screen - iMac doesn't start, all i see is colored lines and then checkered lines on a white background - Ask Different
![screen - iMac doesn't start, all i see is colored lines and then checkered lines on a white background - Ask Different screen - iMac doesn't start, all i see is colored lines and then checkered lines on a white background - Ask Different](https://i.stack.imgur.com/nr6xr.jpg)