If your external monitor is not working via your mini vga (if that's the correct hook up), then you're not generating a video signal and the GPU is gone. Nothing to do but replace the logic board. You'll need to stay with the same GHz board as the erlier one have different power connectors.
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If your external monitor is not working via your mini vga (if that's the correct hook up), then you're not generating a video signal and the GPU is gone. Nothing to do but replace the logic board. You'll need to stay with the same GHz board as the earlier ones have different power connectors.
If your external monitor is not working via your mini vga (if that's the correct hook up), then you're not generating a video signal and the GPU is gone. Nothing to do but replace the logic board. You'll need to stay with the same GHz board as the erlier one have different power connectors.