I would see if leveraging the startup command ***Option (⌥)*** allows you ******to access the Startup manager and can see if the internal SSD is accessible. If it is, select it to see if that fixes the boot drive setting which can also cause the Question Mark issue. Then open the Pref setting to set it as the boot drive.
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I would see if leveraging the startup command ***Option (⌥)*** allows you to access the Startup manager and can see if the internal SSD is accessible. If it is, select it to see if that fixes the boot drive setting which can also cause the Question Mark issue. Then open the Pref setting to set it as the boot drive.
I would see if leveraging the startup command ***Option (⌥)*** allows you ******to access the Startup manager and can see if the internal SSD is accessible. If it is, select it to see if that fixes the boot drive setting which can also cause the Question Mark issue. Then open the Pref setting to set it as the boot drive.
Reference: [https://support.apple.com/en-us/102603|Mac startup key combinations]