My pc won't work default boot device missing or boot failed. Insert recovery media. Then select "boot manager" to choose boot device or boot recovery media. In boot manager comes up with
Fixed – Default Boot Device Missing or Boot Failed on Lenovo/Acer
Default Boot Device Missing or Boot Failed? (Computer, Technik, pc-startet-nicht)
Fix Default Boot Device Missing or Boot Failed in Lenovo - YouTube
Fix: "The Selected Boot Device Failed" Error on Windows?
Default boot device missing or boot failed - YouTube
DEFAULT BOOT DEVICE MISSING OR BOOT FAILED (RESOLVIDO) - YouTube
Default Boot Device Missing or Boot Failed
Fix default boot device missing or boot failed - YouTube