Skip to main content

Fix Your Stuff

Right to Repair


Model A1174 with 2 GHz Core Duo or Model A1207 with 2.16 or 2.33 GHz Core 2 Duo

280 Questions View all

Will not turn on

Hi my imac worked perfectly for 6 years, went to switch on yesterday and nothing at all, no lights or noise. I can hear a clicking sound from the rear !!


Answered! View the answer I have this problem too

Is this a good question?

Score 0


Please give us the last three figures of your serial number (located on the bottom of your stand). This will allow us to get to to the correct repair guide. The machine you selected is a 2008 model and you've stated you have an older machine. Thanks


Hi Jerry

Thank you for your response, i actually have a Imac EMC 2105. Could the error be thrown up by the inverter ?



Not unless Apple hard-wired the system's functions to the backlight control. That's all the inverter does. If that goes out, all that happens is you can't see the screen, but it technically still works. This is not your problem. (It may well be fried, but that's not what's causing your problem. I still suggest checking the power supply.)


Jerry - diagnostic LEDS?


Ok, here's a link to another post that's very similar. This might give you a place to start, at least. Courtesy mayer after a Google search. (This site comes up a lot there. :p ) iMac - no power, number 1 diagnostic LED on


Add a comment

2 Answers

Chosen Solution

It could be a couple different things, but my first thought is a failed power supply. It could be shorted out due to a component failure, which would certainly prevent any other components from starting up and could cause a clicking sound.

Check the power supply itself using the guide here.

While following the steps to get at it, keep an eye out for any other signs of damage or problems (discoloration of the logic board, scorch marks, any burnt smell, or anything obvious). It's unlikely, but I wouldn't dismiss the possibility.

If you don't have the tools, you can get them through the Parts & Tools section of the site. The ones you need will be at the beginning of the guide (you can click on them to access their respective pages).

I hope this helps!


To repeat the comment above, here's a link to a similar thread on the same machine. Thanks to mayer for this bit of diagnostic advice:

iMac - no power, number 1 diagnostic LED on

Was this answer helpful?

Score 1


+ thanks for the add, with an accepted answer sometimes it's hard to add things


Add a comment

Did you get any solution to that problem?

My 2118 has absolutely the same symptoms including clicking at the rear.

Could that be caused by the internal battery had gone flat?

Was this answer helpful?

Score 0
Add a comment

Add your answer

dan chalkley will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 0

All Time: 2,451