Hello! I have late 2007 20" imac(2Ghz version).
This problem started few weeks ago. I upgraded my RAM from 1 to 3GB and i upgraded to snow leopard. At first my screen went black and computer froze when playing UT2004 under windowsXP(bootcamp). Later it started going black more often and also when not playing the game. For example - I open several apps at the same time and my screen goes black. My computer is still working - i can test it by adjusting volume with keyboard. It has happened several times under mac as well but 90% of the time it happends under windows.
So far I know that this problem isn't caused by faulty RAM chip, because i removed the chip and it didn't help.
After I upgraded to win7 i had several times when screen went black and then turned back normal after few seconds - win7 sayd there is a problem with my intel chipset.
I did a clean install of snow leopard and windows 7 - didn't help.
I did a clean install of leopard and windows 7 - still nothing.
I tryed cmd+opt+P+R
I tryed switching off my mac and holding the power button for 5 seconds - didn't help as well
Is there anything else I can try or should I just get it to a technician?
Edit: I had my video card once changed after I woke up one morning and the display wasn't working. That was few years ago(mid 2008 or smth like that)
This problem started few weeks ago. I upgraded my RAM from 1 to 3GB and i upgraded to snow leopard. At first my screen went black and computer froze when playing UT2004 under windowsXP(bootcamp). Later it started going black more often and also when not playing the game. For example - I open several apps at the same time and my screen goes black. My computer is still working - i can test it by adjusting volume with keyboard. It has happened several times under mac as well but 90% of the time it happends under windows.
So far I know that this problem isn't caused by faulty RAM chip, because i removed the chip and it didn't help.
After I upgraded to win7 i had several times when screen went black and then turned back normal after few seconds - win7 sayd there is a problem with my intel chipset.
I did a clean install of snow leopard and windows 7 - didn't help.
I did a clean install of leopard and windows 7 - still nothing.
I tryed cmd+opt+P+R
I tryed switching off my mac and holding the power button for 5 seconds - didn't help as well
Is there anything else I can try or should I just get it to a technician?
Edit: I had my video card once changed after I woke up one morning and the display wasn't working. That was few years ago(mid 2008 or smth like that)
