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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

20" Aluminum iMac - Black screen

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Member Since: Nov 29, 2009
Posts: 1
Ophelia is on a distinguished road

Ophelia is offline
Hey guys, so this is my first post on the forum -- apologies if the format is incorrect.

20" Aluminum iMac, 2.66 Ghz Intel Core 2 Duo
4GB memory (came with 2GB and I upgraded it myself)
Running Snow Leopard

Sometimes when I am exiting out of a program (iChat, Firefox, Adium, Microsoft Word)... my screen turns black (can see that it is still illuminated, the screen is still obviously on).

There is no way for me to get my screen back, and if I press the power button on the back of the computer it puts it to sleep or something (does not turn the computer off). The only way for me to get my screen back is by turning off my power bar and rebooting.

This was happening before I upgraded my memory, and it happens 2 - 4 times a week. I am wondering if my iMac is overheating, it gets up to maybe 45C sometimes.

Any ideas?

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Member Since: Nov 24, 2009
Posts: 3
spikespeigol is on a distinguished road

spikespeigol is offline
When the ma powers on and you hear the sound, hold the following keys down


If you still get problems after that, insert the snow leopard disk taht came with the mac

After you hear the startup sound hold down the following keys


This should start the apple diagnostic tests to see exactly what is wrong with the computer
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Member Since: Nov 23, 2009
Location: Washington
Posts: 6
fiolu is on a distinguished road
Mac Specs: 27imac i7 8gig 4850, 2x24 imacs 4gig gt130, 15inch MBP 4gig 9600m, iphone, 3g,3gs,itouch

fiolu is offline
45 degrees C, is nice and cool for the cpu, it isn't even close to overheating.

iMac 27 i7, 8gig, 4850, 2x24 4gig, gt130, 15MPB 4gig, 9600m, iphone, 3g, 3gs, itouch
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Member Since: May 15, 2008
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Jawad is on a distinguished road

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Jawad Mir
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5D Mark II-AF100 & Mac Book Pro & Mac Pro
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