Re: MacBook Air A1465 820-3435-B chimes but no video
You should be able to get into the bootpicker via OPTION. Reasons are faulty keyboard or possible EFI corruption. Try both keys on either side of the spacebar, or you could try a PC keyboard via USB and hold the ALT key.
A MAC OS USB installer should boot automatically though if you have no SSD fitted. If it still doesn't boot via that method, issue is likely EFI related. I'd be trying a clean ME donor EFI for this machine and go from there.
You should be able to get into the bootpicker via OPTION. Reasons are faulty keyboard or possible EFI corruption. Try both keys on either side of the spacebar, or you could try a PC keyboard via USB and hold the ALT key.
A MAC OS USB installer should boot automatically though if you have no SSD fitted. If it still doesn't boot via that method, issue is likely EFI related. I'd be trying a clean ME donor EFI for this machine and go from there.
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