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Screen shuts off immediately!

I have the metioned iMac here where i replaced the optical drive. I tested it (with the front bezel off) and everything was great. The suddenly the screen died.

Now, when I switch it on i see the grey startscreen for a second or two and then it gets dark again. I zapped pram and SMU. I tried to boot it from CD. No change. I haven't hooked it up to an external monitor but will do so in a minute and post the results. It appears to start normally (although no picture), it chimes, the fans and HDD operate as usual.

Any idea?

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

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Solved - after reassembeling everything it worked again. But still leaves some questions open. All cables where secure. Did anybody else had this experience?

remacberlin 의 2010년 5월 27일

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게시일: 2010년 5월 27일

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appear to be connected when the are in fact not.

해당 답변은 도움이 되었습니까?

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Also a twist in the cable could open or close a hidden short.

originalmachead 의 2010년 5월 27일

My thought was that the LCD needs some sort of a "ground" connection. When i tested it, the display wasn't screwed down a perhaps only made accidental contact with the EMI shield.

remacberlin 의 2010년 5월 28일

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iMac Intel 20" EMC 2105 and 2118

Screen shuts off immediately!

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Often cables and blocks

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