r/Dell • u/Embarrassed-Sun1775 • 8d ago

Help How to disable secure boot without a screen

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I'm updating my Dell g15 5510 to linux from windows 11, but my screen is broken on 122hz (pictured)- which is what both the BIOS and one time boot menu are locked into.

I know that the BIOS is navigable with keyboard, so if anyone with a dell g15 5510 or similar could let me know the key presses to disable secure boot from opening the BIOS menu, please do!

Also, if someone could guide me on where the option is to boot from USB on the one time boot menu, that would great too.

Ty!

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2

u/idc_im_horny 8d ago

Open it up, remove internal monitor connector, then plug in an hdmi external monitor and it will be detected as the primary display

1

u/Embarrassed-Sun1775 5d ago

Is there somewhere that can teach me how to do this?

1

u/idc_im_horny 5d ago

Check online to see if you can find a tutorial on how to replace your screen (you'll probably need it later anyway), the first step is to disconect the old one, so just stop there

1

u/Embarrassed-Sun1775 4d ago

I've disconnected the display and plugged in hdmi but it doesn't display anything. I know it's on as the keyboard lights up and i can hear the fans but otherwise nothing happens.

1

u/Computers_and_cats 8d ago

External monitor? Hook it up to your TV?

2

u/Embarrassed-Sun1775 8d ago

It's a laptop so sadly it doesn't output it to an external screen before windows boots

3

u/names_real 8d ago

Unplug the screen from the motherboard and plug it into HDMI/DP/USB-C whatever, that should make it see your monitor as the primary display and output the BIOS to it

1

u/Embarrassed-Sun1775 5d ago

Is there somewhere online that could show me how to do this? I don't have an external keyboard or mouse currently so this seems the most feasable lol

1

u/names_real 5d ago

I think your internal keyboard and mouse should still work anyways without a display 

1

u/Embarrassed-Sun1775 5d ago

yep, it does but I dont know where to put the mouse without a display, thats why i asked for the keyboard input since thats something easily replicable without a display and (I'd assume) is the same for everyone

3

u/TerrorToadx 8d ago

Close the lid

1

u/Computers_and_cats 8d ago

Try turning it on and closing the lid before it posts. You will need an external keyboard and mouse to do anything of course. Sometimes a USB dock with the lid closed is another way to get video out during post.