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push start button light go's white then go's off

i thought that it was the power supply so installed a refurbsed one an did the same thing. were should i look next. nothing on the moniter almost like its still not geting power.

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Please let us know what you tried and the results.

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RESEATED VIDEO, shut mac down unplug for 15 sec.. tryed again same results. i'll ck to see if the logi boards getn enough voltage

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Here is a link to the Apple troubleshooting light meanings. If this does not help you need to find a copy of the AHT disk for your computer and try to run the diagnostic test. Are you hearing any sound--seeing any lights?

http://support.apple.com/kb/HT2652

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when i plug mac in i hear a type of click sound toward the plug end.when i hit on button sounds like its gona boot but dosn't. the fans start button lite gos on then off. if i let it pluged in the fans sound like they want to fly???

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This is from official Apple sources

1. Reseat the video card

2. Reset the logic board ( shut down, unplug, wait 15 seconds, plug back in

3, Verify that the power cables are fully connected

4. Check for trickle voltage (see next for instructions on this and a host of other diagnostics (I just found this and it's great)

http://discussions.apple.com/thread.jspa...

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Excellent chart. +

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Yes, I thought that was great. I was actually looking for the LED codes from your answer when I found it.

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