No bootable device
Reboot and select proper boot device
What it means
The BIOS found no drive it can start from.
Common causes
- The drive is not detected (cable, slot, failure)
- Boot mode changed between UEFI and Legacy/CSM
- Boot order wrong
How to fix it
- Check that the BIOS lists your SSD at all. If not, reseat the drive or cable.
- Set the boot mode back to UEFI if you changed it, and make "Windows Boot Manager" first.
- Try Startup Repair from a Windows USB stick.