PC sometimes fails to "see" boot drive

My PC running 11 Insider Beta channel sometimes can't find the boot drive when I start it and opens the BIOS, which doesn't show any boot drive. Turning the PC off and starting again always boots into Windows on the 1st or 2nd try. Then it may be a couple of months before the problem occurs again. The boot drive is on a newish 1TB NVMe (TeamGroup T-Force G50). The motherboard is older (ASUS Prime Z390-A with an Intel i7-9700 CPU). I'm suspecting the problem is more likely the motherboard. It has the latest BIOS (2101 dated 1-11-24). Haven't noticed any other malfunctions. Any ideas?

Sounds like it could be the mobo. Have you tried reseating the nvme?

dacrone said:

Sounds like it could be the mobo. Have you tried reseating the nvme?

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Yes. There are actually 2 NVMe drives. The second one is used for storing backup copies. When the problem occurs, neither drive is seen during posting. I have an identical motherboard not being used and plan to transfer everything to that in a couple of days.

larc919 said:

When the problem occurs, neither drive is seen during posting.

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Yep. Motherboard is the issue.

I had an older Gigabyte Z390 motherboard that had issues with a certain brand of NVMe drives. I verified testing using different NVMe drives. I'd be curious if you're experiencing something similar? These were all Gen 3 drives. Your using a Gen 4 drive on a Gen 3 motherboard. Although it shouldn't matter, one can never be sure. See if there are firmware updates for your T-Force G50s.