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iMac 2009 black screen

H

halo80

macrumors newbie
Original poster
Jan 16, 2011
3
0
I need help with my Fall 2009 iMac which sounds like it’s turning on and running but the screen remains black. I can’t remember the last update that I applied but it was probably El Capitan.

Both my wireless keyboard and mouse are blinking at me so they’re probably not synced anymore to it. I have it connected to an external monitor via a mini-Display port cable. Any ideas/recommendations? I’m not opposed to buying a kit to crack it open.
 
There are two models iMac 2009:
iMac early 2009 (black back)
iMac late 2009 (aluminum back)
Which one is yours?

My hope is iMac late 2009 with a dead GPU.
Because if it's the early 2009, the fix will cost more due to rareness of parts.
 
Nguyen Duc Hieu said:
In post #3 he said the external display was also black....
Click to expand...
This would suggest that it's not a problem of the display panel itself. All you can do is disassemble the iMac and swap parts with another old iMac, until you have a better idea of which part causes the problem.
 
JinxVi said:
This would suggest that it's not a problem of the display panel itself. All you can do is disassemble the iMac and swap parts with another old iMac, until you have a better idea of which part causes the problem.
Click to expand...

Then why did you suggest him to run Apple Hardware Diagnosis on both pit black displays in the first place?
 
JinxVi said:
This would suggest that it's not a problem of the display panel itself. All you can do is disassemble the iMac and swap parts with another old iMac, until you have a better idea of which part causes the problem.
Click to expand...
This is what I was fearing but expecting. Thanks!! Much appreciated!
 
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