Boot process recovery very very slow and stops
Sorry for my English, come from Germany.
I have a Macbook Air 13" 2014 Board 820-3437-B, no water damage or anything else.
It booted permanently in the loop with the startup sound.
I exchanged the EFI/SMC chip for a reprogrammed one. Now it takes about 1 minute until the start tone comes and after about 1 minute the Apple logo appears with the bar. The bar will load for about 45 minutes until the end and then stops. Nothing happens anymore. I can't go into recovery mode.
Everything is fine on the logic board, no corroded areas or the like.
SMC reset, NVRam reset, I did everything. Apple diagnosis showed no errors.
I also disconnected everything from the logic board and tried to start it blank, so only display. Without keyboard and trackpad.
Can anyone help me?
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