All-in-one desktop computers from Apple. iMacs have been equipped with Intel processors since January 2006.

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Boot Up. power problem

Hi, My iMac Will Not Boot Up I Don't get A Startup Chime no Display. no Power On DVD Drive Fans Running At High Speed. On The Logic Board I Got One Out Of Three Lights Are Green. Thank You

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Would you look on the bottom of the stand and give me the information there? speed, EMC#, & Axxx number

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Chosen Solution

Reset the SMC

Shut down the computer.

Unplug the computer's power cord.

Press and hold the power button for 5 seconds.

Release the power button.

Attach the computers power cable.

Press the power button to turn on the computer.

Let me know if this fixes it.

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Hi, Mayer Thank You For Your Response I Tried All Of Those Things And Still Have The Same Problem. LED #1 Is Bright Green No Flickering. I Think You Are Correct I Have A Bad Logic Board. But Thanks Again For All Your Help. rhodes00

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Don't be so fast to give up. Look at the cans on the logic board. Do any have corrosion on the tops? Are any of them bulged? Do they look like this?http://images.google.com/images?client=s...

Now look at tthe power supply and see if you any burn marks on it. Hit the reset button on the power supply power.

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Diagnostic LED's for that model

# 1 Trickle Power from Power Supply

# 2 Computer On

# 3 LCD and Video Communication Good.

Is Led #1 nice and bright without flickering? sometimes you can have a bad power supply, and still get trickle voltage. if its not the power supply - its probably a bad logic board. there are some other parts inbetween.. but rarely do they fail.. cable, AC/DC board.. etc.

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rhodes00 will be eternally grateful.
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