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

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No video (black screen) upon boot, is it my logic board?

Thanks to the excellent info on this site I have tried the following things that all result in the startup chime, but no video:

  • Start from intall disk, holding down C
  • Start from install disk, holding down D (hardware test)
  • Reset PRAM w CMD+OPT+P+R
  • Change RAM to known good RAM
  • Using known good RAM test each RAM slot independently

I was also able to access the hard drive just fine after booting into firewire target disk mode (holding down T)

I will need to buy an adapter and borrow a friends monitor to test the external display. If I do so, what is the value of this test? Determining if it's the LCD itself vs. the logic board?

I no longer need this computer but I want to either fix it myself (I am capable of an easy or moderately difficult repair) or accurately describe the issue if I sell it as-is.

Thanks in advance!


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1 Answer

Chosen Solution

If the external works then your GPU (graphic processor unit) is fine.

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