Try creating a bootable USB on a working mac. If you are unable to find it through apple the best outside option is through DosDude's website. He made a convenient package that allows you to download the firmware outside of Apples ecosystem and create a bootable installer. [br]
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We have seen some odd hardware issues that can cause the computer to not properly install MacOS but I don't think that is the issue here.
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We have seen some odd hardware issues that can cause the computer to not properly install MacOS but I don't think that is the issue here.[br]
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As far as I understand Recovery mode does not run off external GPU but off the integrated graphics.
Try creating a bootable USB on a working mac. If you are unable to find it through apple the best outside option is through DosDude's website. He made a convenient package that allows you to download the firmware outside of Apples ecosystem and create a bootable installer. [br]
We have seen some odd hardware issues that can cause the computer to not properly install MacOS but I don't think that is the issue here.