imac24" 8,1 Backpanel fail

Discussion in 'iMac' started by Grillbiller, Feb 27, 2012.

  1. Grillbiller macrumors newbie

    Joined:
    Jun 12, 2006
    #1
    My early 2008 imac 24" lcd panel starts to flickering and go black, and after a while the screen start up again... for a random of secunds for going to black again.
    i had try Reset Pram and SMC and rund Apple Hardware test. (No errors)
    i had also try put a secund monitor into the minidvi and that works.

    when i take a Flashlight and light into the screen.. i can see graphic.
    so it not Graphic chip that dead.

    i try replace the main logic board and that did not help.. still black screen.
    i try replace LCD Screen and that did not help either.
    i had also try remove the LCD Temp. cord ... Fan Starts up... but screen still black.

    what next to try?
    I think that must be a component that control backlight to turn on/off that fails. but where is that? is that build into the LVDS cable or in the powersupply?
     
  2. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #2
    How about the inverter? One of the cheaper things to replace and the go to one for failing backlights.
     
  3. Grillbiller thread starter macrumors newbie

    Joined:
    Jun 12, 2006
    #3
    i do believe that the inverter board is placed in the LCD Panel that i had try replace with a other LCD Panel.

    But again... there is a slidge change that the LCD Panel i brought from ebay had the same issue..
     
  4. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #4
    I know on the 20" iMacs it's a separate board. Also try replacing the inverter cable and power supply.
     
  5. Grillbiller thread starter macrumors newbie

    Joined:
    Jun 12, 2006
    #5
    well.. i had just ordred servel cables now... for about 100 Dollars...

    iMac 24" Inverter Cable 922-8856 (Model A1225)
    iMac 24" LVDS Cable GS20091
    Intel iMac 24" Inverter Power Cable

    then i had use about 500 Dollars trying to wake up my imac from backpanel issue.. ill cry my self to sleep if it "Only" was a inverter cable to 15Dollars...
     
  6. Grillbiller thread starter macrumors newbie

    Joined:
    Jun 12, 2006
    #6
    And a update...
    Changing the iMac 24" LVDS Cable did not wake my imac24" back to life... :mad:
     
  7. leman macrumors 604

    Joined:
    Oct 14, 2008
    #7
    Just saying, but for that money (+ selling your iMac for spare parts) you could have gotten a refurbished 21.5" iMac, which is better in any regard than your 24" machine. Sometimes it is just to expensive to repair things...
     

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