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Apple Computing Products:
macOS - Desktop Hardware
GPU issues 9,1 imac 24"
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<blockquote data-quote="LKJ" data-source="post: 1586327" data-attributes="member: 327191"><p>I replaced the NVIDIA 130GT w/ a 4850 AMD Radeon card from a 27" imac, same year (late 2009). Computer boots, all 4 LEDs go on, computer accessible from remote screensharing on the LAN so is obviously up and running. No picture on the screen (backlighting working).</p><p></p><p>I think it's an EFI/firmware problem w/ the new card. Any ideas as to a work-around? Edit the BIOS in the GPU to match the 24 inch screen or the Logic board ID? Thoughts? Thanks!</p></blockquote><p></p>
[QUOTE="LKJ, post: 1586327, member: 327191"] I replaced the NVIDIA 130GT w/ a 4850 AMD Radeon card from a 27" imac, same year (late 2009). Computer boots, all 4 LEDs go on, computer accessible from remote screensharing on the LAN so is obviously up and running. No picture on the screen (backlighting working). I think it's an EFI/firmware problem w/ the new card. Any ideas as to a work-around? Edit the BIOS in the GPU to match the 24 inch screen or the Logic board ID? Thoughts? Thanks! [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
GPU issues 9,1 imac 24"
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