I've transplanted the SSD drive between two identical MacBook Air's - both are 13" Early 2015 models - as one of them had died. Upon moving the SSD from the dead MacBook to the other one, booting the computer presents me with the folder and the question mark icon.
Holding down ⌥ Option on boot only gives me the option for network recovery. I created an installation USB using the same OS that is on the SSD (High Sierra) and booted into it. Here I can see the disk in disk utility and everything appears normal. I ran first aid on the disk and no major errors were found, only a few permission errors were fixed.
When selecting the Startup Disk option, I have the option to choose the SSD however upon reboot it cannot be seen again, only the installation USB is detected. (See below pictures)
How can I get the "new" MacBook Air to boot from the "old" SSD?
If there is anything I missed, please let me know!