Is this a UEFI laptop? How many times did you boot successfully before the failure started? Did it coincide with first removal of the installation media? Had you just made some seemingly immaterial change in BIOS/UEFI setup? The problem could be lack of boot flag anywhere on the new SSD. Without one, it's possible the boot process doesn't get as far as Grub. That message means the BIOS found nothing configured to be bootable.
Statistics: Posted by mrmazda — 2024-03-14 05:25