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The iMac is Apple's line of all-in-one desktop computers.

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iMac g5 wont power up/

How do I know my power supply is working properly, befor buying a new one?

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Look on the bottom of the stand to find your exact model.

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You could try opening your iMac so you can turn it on and see if the diagnostic leds light up.

http://support.apple.com/kb/HT2831

in particular:

Locate the large white arrow in the middle of the computer.

Above this arrow, you'll see four LEDs:

LED 1 indicates that trickle voltage from the power supply has been detected. This LED will be ON when the computer is turned off and your power supply is working correctly.

UPDATE:

If the 1st light is on that indicates that the power is flowing to the computer. So it could very well be a logic board failure. At this point i'm not sure trying to repair a logic board failure is worth it.

Sorry.

Make sure you pull the HD though if you want to recover your data.

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Thank you for your kind response.

I did tried to open it, and the led1 light is on, none of the others, and tried to switch on through internal button- no response and tried reset and again internal button- no response.

according to the apple literature- it is logic board failure- do you agree with that?

Thank you again

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Is the #1 light on when the computer is turned off?

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Thank you, when I plugged the wire to a outlet, it is on and when I take out the wire it is off. My main problem is turning on the machine with the button from the behind.

Thank you again

arivu

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