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iMac Intel 27" EMC 2309 (Ende 2009, Core 2 Duo 3.06 oder 3.33 GHz) ID iMac10,1, EMC 2374 (Ende 2009, Core i5 2.66 GHz oder Core i7 2.8 GHz) ID iMac11,1

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not video signal on iMac's LCD

Hi. I have got a 2309 iMar 27” late 2009. The iMac’s video card was broken. When I turned on the mac, the chime was heard, the screen lit up a bit, but nothing else happened even using an external monitor

Setp 1: Well, I changed video card, I turned on the iMac, chime was heard, the screen lit up a bit and I had video signal on external monitor, but not video signal on iMac’s LCD.

I was thinking that inverter was broken or a wire was bad connected. It was more easy to check wire connections but I do that without turning off the iMac and the vflex touched power supply and broke it (It was my fault, I should have rurned off the iMac).

Well, I changed power supply and I have got video signal on external monitor only and I was in step 1 again, then I changed inverter but nothing new happened.

I’m thinking that vflex wire brought electricity to the LCD and broke it, but I'm not sure why the iMac detects the LCD. In that case, it is any way to check LCD?

Maybe the LCD is broken.

any ideas?

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Can anyone help me?  I have changed the power supply, the inverter and the screen, but I still can't fix it.  I need help please


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If you unplug external Monitor does it work?

Reseating ram can help with display issue sometimes but if it works on external it may well be that your LCD is broken or shorting out.

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anks for your response.

With external monitor unpluged iMac does not work.

I will try to reseat ram.

It is possible a shorting our on LCD when iMac can detect the LCD?


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Jorge Yerbito wird auf ewig dankbar sein.
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