CRT or LCD
My mac had the same problem.Too bad macs are handicapped so instead of switching monitors I had to get rid of it.
inb4 igloos buys a alt and flames you
LOL
https://discussions.apple.com/thread/1842041?start=0&tstart=0
i seriously think apple rigs their products to fail just for money
It may be your graphics card, this exact same problem happened on an old laptop of mine