Black screen instead of bootloader, then start

Maybe the issue is that the installation was intended for UEFI and my BIOS is Legacy, or the other way around or smth.

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Btw here's the boot menu I get when I press ESC at turn on: https://i.postimg.cc/G38gXmRJ/viber-...5-18-10-00.jpg

The "Endless OS" is probably the Linux one I got when I bought the PC.
Maybe the UEFI one is from the older installation?
The Windows Boot Manager boots into the black screen, I checked.

What did the BIOS say? UEFI or some combination? Just post a picture so we can see what you see what you find it.

Change the boot device to UEFI and try (from you last picture) You can change it back so don't worry. That may actually fix your black screen problem, but you have to be brave and try it - and you can change it back easily.

steve108 said:

Change the boot device to UEFI and try (from you last picture) You can change it back so don't worry. That may actually fix your black screen problem, but you have to be brave and try it - and you can change it back easily.

Multiple errors started to appear fast like "no device found" or something similar. Had a mini heart attack.

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steve108 said:

What did the BIOS say? UEFI or some combination? Just post a picture so we can see what you see what you find it.

Says UEFI if this is what your asking for: https://i.postimg.cc/jSDd3f8d/Untitled.png

I want to see what it says from BIOS directly. I told you you could change it back.

steve108 said:

I want to see what it says from BIOS directly. I told you you could change it back.

What exactly should I do in BIOS?

You must be booting in UEFI mode because the disk is GPT and legacy BIOS (CSM mode) will not boot from a GPT disk. I would do the driver updates.

manvas said:

What exactly should I do in BIOS?

Nothing, other than make sure it is the most up to date version offered by Lenovo. You must be booting in UEFI mode because the disk is GPT and that is the only mode you can boot in from a GPT disk.

steve108 said:

I want to see what it says from BIOS directly. I told you you could change it back.

https://i.postimg.cc/YScRh1Zv/viber-...5-18-43-24.jpg
https://i.postimg.cc/XJLkHtJ5/viber-...5-18-43-23.jpg

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NavyLCDR said:

You must be booting in UEFI mode because the disk is GPT and legacy BIOS (CSM mode) will not boot from a GPT disk. I would do the driver updates.



Nothing, other than make sure it is the most up to date version offered by Lenovo. You must be booting in UEFI mode because the disk is GPT and that is the only mode you can boot in from a GPT disk.

I all the drivers in the SS except the ASUSTeK Firmware one.
Then I checked that also and the laptop restarted and it said it would update the BIOS and I chose No.
MEGA heart attack.

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Please I don't want to update BIOS. How do I cancel the update?

If it was me, I would copy any data off the internal drive that you need to keep, wipe the drive completely clean and do a clean install to the blank disk.

NavyLCDR, some BIOS have UEFI + CSM or some such dual combination. I wanted to confirm this is set to just UEFI alone, but have not seen OP post a screenshot of that from BIOS.