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Push power button, chime sounds, but there is no picture or video on the display
I did PRAM RESET by Shut down the computer Waited 5 second then press
Command, Option, P, and R. You will need to hold these keys down simultaneously
I can Hear The HD Is trying turn On with Loud fan noices ...what should i do next?
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Here is a link to Apples check out procedure. Hope it helps you.
这个答案有帮助吗？
+ very nice link. also open it and check for corroded or swollen capacitors
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What happens when you connect to an external display?
由 rab777hp 完成的
how can can i connect xternal display ? do i special cable ?
由 lutaph 完成的