NVMe boot drive missing from BIOS priority list after sudden power cut
An abrupt power outage or hard reset causes the NVMe controller to enter a lockup or low-power recovery state, making the drive temporarily vanish from the motherboard UEFI boot menu.
Internal desktop parts run on harmless 12V DC voltage and cannot shock you. Simply unplug the wall power cable first, then touch the unpainted metal case frame to ground static electricity.
Common Symptoms & Tells
- PC boots straight into setup utility
- M.2 slot shows 'Not Present' or 'Empty' in storage overview
- Error: 'Reboot and Select proper Boot device' appears on screen
Interactive Fix Checklist
0 of 4 steps completedPerform a full motherboard power drain (capacitive discharge)
Shut down the PC, unplug the AC power cord from the wall, and hold down the front chassis power button for 30 full seconds. Reconnect AC power and turn on the PC.
Reseat the M.2 NVMe SSD in its slot
Unscrew the M.2 thermal heatsink, remove the NVMe drive, inspect the gold edge contacts for dust, and firmly insert it at a 30-degree angle before fastening the retention standoff.
Check CSM / UEFI boot mode compatibility
In settings, navigate to Boot > CSM (Compatibility Support Module). If your Windows was installed in pure UEFI mode, ensure CSM is Disabled and Windows Boot Manager is selected as Priority 1.
Test NVMe in secondary M.2 slot
If the primary CPU-connected M.2 slot does not register the drive, move the to a chipset-connected M.2 slot on the lower half of the motherboard to isolate a dead lane or controller fault.
Still having trouble with your PC?
Describe what is happening to your AI Technician. We will tailor the fix to your exact hardware setup.