iMac 24 black screen
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Author:  ritch [ Wed Mar 07, 2012 5:28 pm ]
Post subject:  iMac 24 black screen

My iMac 24" (early 2008) has developed a problem. Black screen!!

It powers up and makes all the usual start up sounds. As it was active when this occurred, it makes the sound when email is received etc.

If I look very, very, very close to the screen I can just make out the open windows etc.

I have attached an external monitor and it displays the screen saver. All 4 small LEDs light up and turn off appropriately as it goes in to sleep mode etc.

My question: Is it a safe bet that it is the LCD panel that needs to be replaced.


Author:  justin-pbmedic [ Wed Mar 07, 2012 5:35 pm ]
Post subject:  Re: iMac 24 black screen

That is typically the inverter which is what controls power to the backlight. The LCD can also be the culprit.

Author:  ritch [ Thu Mar 08, 2012 4:25 am ]
Post subject:  Re: iMac 24 black screen

Thanks Justin.

A further update.

It flickered and came back to life. I took the opportunity to erase the hard drive and install the original OS etc.

During that exercise it behaved. Powering up and down as it went through the installation process. I shut down and went to bed. This morning it is black screen again. Ho hum.

I had a look on your site for suitable inverter board. No Joy. It would appear that this model has the board built into the LCD Panel. I'll need to have a look at my penny jar.

iMac 24 (early 2008)

Thanks and regards,


Author:  ritch [ Mon Mar 12, 2012 3:18 pm ]
Post subject:  Re: iMac 24 black screen

An update for information.

I borrowed a friend's LCD panel and it didn't fix the problem. It still exhibits the exact same symptoms.

I fear that it is a lost cause. :(

I have now bought a 27" iMac to allow me to put the hassle behind me.


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