My iMac won’t turn on
I’m very stressed, I have a 2006 core 2 duo iMac 20 inch which is my main computer for school and such and whenever I try to boot it up the screen turns black after the apple logo and recovery mode and internet recovery don’t work ive tried booting off external bootable macos installer OS X snow leopard and lion and the dvd and all of them cause the screen to go black after I boot into it, so it’s not the hard drive I don’t know what to do I need this computer, I made a Genius Bar appointment for Sunday