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there is a folder icon with question mark when starup, I tried recovery mode. and there is no partition or hard disk detected. I also boot the computer from a portable hard drive, still no disk detected. I did some research, except changing whole logic board, they said change I/O board may solve the issue. Is this worth to try？ thanks
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Hold down the option key when booting from your external drive. Let us know your results.
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it showed external hard drive and WIFI
Select the external drive and then run Disk Utilities > Run First Aid on the internal drive if you can see it.
@mayer tried, can not see internal driver, only external. Even if I click show all device, it still same thing.
What country do you live in? We will probably have to look at your Consumer Law Rights.
@mayer I live in Canada. I found a post that a 13in macbook pro has same problem, but it was eligible for recall. however, 15in is not included.
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Update: I found the Touch ID is not working when I run Big Sur thru external drive. Touch bar works fine. Does lifeboat connecter failure ciuld cause this？
из Lei Li
Reset SMC did not bring Touch ID back
из Lei Li