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172

07-11-2021, 08:07 PM

I built my own PC with a B550M motherboard. To install Windows 11 I needed secure boot enabled. I didn’t do enough preparation, turned off the CSM, and now it won’t start. I removed the CMOS battery and tried connecting the pins, but that didn’t help. I also attempted a BIOS update via Q-flash, but it failed. Could you get some advice or let me know if this setup is faulty?

koolkittyLR

07-11-2021, 08:07 PM #1

Spark670
Junior Member

07-13-2021, 07:26 PM

Removing CMOS restores the system to its standard UEFI startup. Disassemble and reassemble using only essential parts. The processor, cooling solution, one memory module, and a graphics card are required—unless your device includes built-in video or an APU.

Spark670

07-13-2021, 07:26 PM #2

Lufishi
Junior Member

07-15-2021, 12:15 PM

I've already attempted it. The CMOS reset doesn't appear to work. I've also tried rebuilding it with minimal settings, but still no improvement.

Lufishi

07-15-2021, 12:15 PM #3

I've already attempted it. The CMOS reset doesn't appear to work. I've also tried rebuilding it with minimal settings, but still no improvement.

OldManIceCubes
Junior Member

07-16-2021, 12:10 AM

Using a separate GPU instead of the built-in one doesn't function properly. This issue arises on some motherboards when CSM is turned off, though replacing the CMOS battery usually resolves it.

OldManIceCubes

07-16-2021, 12:10 AM #4

Using a separate GPU instead of the built-in one doesn't function properly. This issue arises on some motherboards when CSM is turned off, though replacing the CMOS battery usually resolves it.

livlev44
Junior Member

07-16-2021, 12:29 AM

I thought that too, but didn't get it. Thanks still.

livlev44

07-16-2021, 12:29 AM #5

I thought that too, but didn't get it. Thanks still.

SynR_surfen12
Junior Member

07-17-2021, 01:51 PM

What interface are you connecting to the GPU? Is it a DP port? You may want to test HDMI too, since it has helped in some situations or if your GPU uses an older VGA or analog connection.

SynR_surfen12

07-17-2021, 01:51 PM #6

What interface are you connecting to the GPU? Is it a DP port? You may want to test HDMI too, since it has helped in some situations or if your GPU uses an older VGA or analog connection.