2008 iMac woes

Discussion in 'iMac' started by Adamscomputerrepair, Oct 19, 2018.

  1. Adamscomputerrepair macrumors 6502

    Adamscomputerrepair

    Joined:
    Aug 9, 2015
    #1
    Last night, I bought a 2008 (I assume cause that’s the copyright date on the bottom) iMac from a very generous individual for $5. Not knowing what condition it was in, I plugged it up and turned it on. It chimes, the screen comes on for a second, then goes right back off. I tried plugging in an external monitor. I can see things on the external monitor albeit with a lot of artifacting. I don’t want to believe it’s the graphics card cause when I move my mini display adapter the artifacting clears up.

    So, any ideas? Or am I screwed?
     
  2. davidgnomo macrumors 6502a

    davidgnomo

    Joined:
    Feb 16, 2012
    Location:
    Imola (BO) - Italy
    #2
    Screwed for just a 5 $ purchase ??? Naaaaaa ...
     
  3. vertical smile macrumors 68040

    vertical smile

    Joined:
    Sep 23, 2014
    #3
    Maybe you can use Apple's internet hardware diagnostic test, and see what pops up.

    Simple Steps:
    Shutdown your iMac fully, not restart
    Press and hold in "Option" and "D" keys at the same time
    Press and release the power button
    Release the held buttons once you see the test icon

    You can also use the "D" button without the "Option" button on some Macs, the "Option" automatically uses the internet hardware test.

    I'm not sure if this works for the 2008 model, but might be worth a try.
     
  4. Adamscomputerrepair thread starter macrumors 6502

    Adamscomputerrepair

    Joined:
    Aug 9, 2015
    #4

    I’m assuming while I’m plugged into an external monitor? Also I should’ve explained better. The guy told me the monitor was bad. However, when the machine powers on, I can see the monitor for a few seconds which tells me it isn’t bad. I’m just praying it isn’t the graphics. If so I just payed $5 for a $~100 logic board
     
  5. mikehalloran macrumors 65816

    Joined:
    Oct 14, 2018
    Location:
    The Sillie Con Valley
    #5
    Burnish the connectors. Remove the NV RAM battery. If it now boots, throw in a new CR2032. I've fixed a few 2008–2009s this way. A bad battery is worse than no battery.
     
  6. Adamscomputerrepair thread starter macrumors 6502

    Adamscomputerrepair

    Joined:
    Aug 9, 2015
    #6
    Yeah took out the NVRAM last night anyway. No dice. Could it be the backlight inverter?
     
  7. mreg376 macrumors 65816

    mreg376

    Joined:
    Mar 23, 2008
    Location:
    Brooklyn, NY
    #7
    Yeah, I'm not sure he'll be able to financially or emotionally recover from that...
     
  8. Adamscomputerrepair thread starter macrumors 6502

    Adamscomputerrepair

    Joined:
    Aug 9, 2015
    #8

    Ok are you guys going to help me, or just make fun of the situation? I saw what I thought was a steal, got it, and I’m just asking for a second opinion on how to fix it.
     
  9. mreg376 macrumors 65816

    mreg376

    Joined:
    Mar 23, 2008
    Location:
    Brooklyn, NY
    #9
    Cool your jets. Just kidding you. It sounds like a power supply issue. I've never replaced one -- maybe someone else can chime in. The trouble is when you're starting off with a $5 investment any expenditure to get the thing running will dwarf that many many times over. Are you willing to go that route with a decade-old machine?? Or in other words, if your repair budget is $10, that will affect the advice you will get, if any.
     
  10. EugW macrumors 603

    EugW

    Joined:
    Jun 18, 2017
    #10
    Just to be absolutely sure, have you tried booting off an external drive.

    I don’t think it’s that, but it wouldn’t hurt to try.
     
  11. Adamscomputerrepair thread starter macrumors 6502

    Adamscomputerrepair

    Joined:
    Aug 9, 2015
    #11
    Power supply was something I didn’t consider however it does boot to an external monitor so I’m not sure.

    I did try a drive out of my MacBook. Same thing
     
  12. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009
    #12
    If it boots to an external monitor (as you mentioned in reply 11 above), then the problem is a bad display panel or perhaps something gone wrong with the GPU portion of the motherboard (if it uses a discrete GPU).

    Probably going to cost you considerably more than it's worth to fix it.
     
  13. Adamscomputerrepair thread starter macrumors 6502

    Adamscomputerrepair

    Joined:
    Aug 9, 2015
    #13
    Okay, I feel a lot better now....


    It’s the backlight.

    How do I know?

    The ol flashlight trick.


    So, now an important question I pose to you all:

    Does anyone know a reputable Mac parts seller? Preferably in the US.
     
  14. mreg376 macrumors 65816

    mreg376

    Joined:
    Mar 23, 2008
    Location:
    Brooklyn, NY
  15. Adamscomputerrepair thread starter macrumors 6502

    Adamscomputerrepair

    Joined:
    Aug 9, 2015
    #15
    Okay. Thanks
     

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14 October 19, 2018