Questions about GIGABYTE products > Motherboards with Intel processors

Aorus Z390 Pro, unable to access BIOS

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vulcan:
Aorus Z390 Pro, i9-9900k, RX6800XT

This system was working perfectly until a few days ago when this fault appeard.

i don't know what I've accidentally changed but now I can't access the BIOS using any method but the PC will boot into Win10 and work perfectly.
On startup, and when trying to access the BIOS, instead of the plash screen I briefly get a DOS type prompt to press DEL, pressing DEL does nothing; NB I am using a wired USB keyboard.
Also the VGA LED remains lit.

I am hoping to avoid resetting the CMOS.

Thanks for any help.

Viv Pyner:
As soon as the computer starts rebooting try pressing the delete key quite rapidly, don't wait for a splash screen. Hopefully this will work. Pressing it once, if that is what you were doing, relies on you guessing correctly when to press it.
Viv

shadowsports:

--- Quote from: vulcan on September 24, 2021, 10:29:33 am ---Aorus Z390 Pro, i9-9900k, RX6800XT

This system was working perfectly until a few days ago when this fault appeard.

i don't know what I've accidentally changed but now I can't access the BIOS using any method but the PC will boot into Win10 and work perfectly.
On startup, and when trying to access the BIOS, instead of the plash screen I briefly get a DOS type prompt to press DEL, pressing DEL does nothing; NB I am using a wired USB keyboard.
Also the VGA LED remains lit.

I am hoping to avoid resetting the CMOS.

Thanks for any help.

--- End quote ---


Windows 10...

Settings > Update and Security > Recovery > Advances Start Up (Restart Now) should get you in to the BIOS.

This is often the result of enabling "Fast Boot"

vulcan:
Thanks for the suggestions however neither of those suggestions work and fast boot is not enabled in windows.

shadowsports:

--- Quote from: vulcan on September 25, 2021, 06:20:51 am ---Thanks for the suggestions however neither of those suggestions work and fast boot is not enabled in windows.

--- End quote ---

Greetings,
Fast Boot and Ultra Fast Boot are set in BIOS.  This is a Gigabyte motherboard feature setting, not "Fast Start Up" which is a windows settings.  You can also set Fast and Ultra Fast Boot in Gigabyte Utilities if installed. 

Obviously you have something else keeping you from entering BIOS.  Both of the suggestions provided could work.

Please post a picture of this "Dos type" box you see during start up?  This doesn't sound normal.

Tell us more about your environment.  What type of display are you using?  Onboard video?  Dedicated GPU, any adapters..  and are you outputting to a LCD, TV etc?  The BIOS can only display at standart resolutions, some larger displays don't allow proper scaling which can keep the BIOS from displaying during start up.

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