No Video, No Startup Chime, 3rd LED is Off
i've got an iMac 20 inch (Late 2006) with a booting problem. After pressing the power button i can hear noises from the fan, harddrive and so on, but there is no video signal the screen stays dark and there is not the usual start up chime!
I did a little research and opened the iMac to locate the 3 service leds. When i start up the iMac only LED 1 and 2 are glowing and the white big LED on the front panel stays on. The third LED on the right hand side of the memory slots stays off.
I tried to reset the SMC according to the service manual i found here: http://www.scribd.com/doc/46053763/iMac-... on page 158, but this didn't help at all. All i got was a high spinning fan and still no video signal. After removing the power cord again, waiting, pluged it in again, powering up the high fan spinning was gone again.
At the moment i got only a wirless Keyboard, so i can't reset the PRAM. Is that right?
I removed both RAM memory bars, but still no luck. No video, no start up chime, no third LED. Not even a beep for the missing memory. The RAM memory work flawless in a old MacBook. Trying the memory of the MacBook in the iMac didn't helped too.
So, my question is: is the Logic Board or the Screen? Anything else i should try?
Thanks in advance for your help, suggestions and support.
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I am having this exact same issue right now. Was this ever resolved?
- de Carl Hancock
I too have the same problem. Any answers Apple?
- de James
I am having the same problem I even bough a use imac and switched everything that I could and still nothing please we need help
- de Jose Casarez
Have a similar problem with A1207, without LED panel led 3 no light but external monitor good and show "?" because HDD its new. When put LCD panel led 3 its light, but no chime and black screen.
Apreciate some coments!
- de JOSE ANTONIO