IMAC no powering up

Discussion in 'iMac' started by dannieboiz, Sep 6, 2016.

  1. dannieboiz macrumors newbie

    Sep 22, 2013
    I have a 2011 IMAC 27" with an i5 processor, I open it up to put in an i7 2600 after I put it all together it wouldn't power on. On the logic board, I can see 1 lights on. With the LCD removed, I can see the fans trying to kick in and shutting back down.

    Is there anything I can do like resetting the power supply or the machine?
  2. Tim in Scottsdale macrumors member

    Mar 13, 2016
    Scottsdale Arizona

    Check your connectors carefully, you may have plugged it back together wrong.
  3. dannieboiz thread starter macrumors newbie

    Sep 22, 2013
    thanks, stupid me I tried to power it up before dropping the RAM in. It's booting fine now. However I now have a new problem. my ODD and CPU fan is running @ max speed it seems. ODD @ 3500 and CPU @ about 3900 RPM. Tried resetting SMC and PRAM with no luck. Any suggestions?
  4. havokalien macrumors 6502a


    Apr 27, 2006
    Kelso, Wa
    Thermal paste on cpu not even or its sensor you may not have fully plugged in. I would also say the connection for the other sensor due to all the pull apart done.

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