Greetings, I took the hard drive out of the laptop and sent it to the service. When I install the hard disk and turn on the laptop when it comes from the service, debian does not appear on the grub selection screen? Debian looked before and I could run it. When I look at a live distribution, the debian disk is also installed, but I cannot start the system because it does not appear on the group screen and the boot manager screen on the bios. What could be the reason?

Not enough information, try to be much more specific about what this 'service' involved.
Was Debian the only system on your disk?
Perhaps they wiped/blanked you disk, in which case you will need to re install Debian.

What service did you send the hard drive to, and why? What did it do?

If you could use the bootinfoscript utility using a live boot, upload its output to http://paste.debian.net/ or https://pastebin.com/ and post the link it provides here possibly we could tell you how to put Debian back into the startup menu.

I was misunderstood for using a translation site. sorry. I did not send the hard drive to warranty service. I just sent the laptop to the warranty service. I took the hard drive. Debian was working before. But now the bios screen and boot manager does not appear. That's why I can't start the system.

If you will go into BIOS setup and switch Legacy mode to the opposite of its current setting it may quickly fix the problem. If it does not, please follow my previous instruction to use bootinfoscript. The service may have upgraded or reset BIOS to defaults, while your hard drive is set to use the opposite UEFI vs. Legacy setting.

legacy support - enabled appears. do I disable ?

Do you know whether you installed to your hard drive in UEFI or Legacy mode? While boot to live media, what does 'efibootmgr' report? You can try disabling Legacy. If it doesn't help, you can reenable it, then try bootinfoscript.

What exactly does appear on the screen trying to boot it when you expect to see Debian?

I think they did something about the bios in the service. Previously, debian appeared on the boot manager screen. But now it doesn't. That's why I can't run it. I'll make your bootinfoscript suggestion.


http://imgbox.com/huGR81dG
http://imgbox.com/el6xAI4R

That's the bios screen.

Looks like the ubuntu I've erased and erased before. Debian doesn't show. I can't start the system because I deleted Ubuntu. grub gives error 2.02.

If Debian appeared previously in the BIOS setup under System Configuration, OS Boot Manager as shown in your second image, then obviously it is gone. It really isn't clear after your second post referencing Ubuntu, whether you had an entry for Debian here in the BIOS or whether you had an entry for Debian on the Ubuntu Grub boot menu. I'm guessing the latter since you say you deleted Ubuntu so if that is the case, you need to install Debian to the EFI partition. Posting the output of the bootinfoscript should clarify this.

Also could you clarify, you sent the laptop to some service under warranty but removed the physical hard drive on which you had Debian before sending it, correct?

The above quote is from your initial post, did you mean "grub screen"?

Your HP should have an option to 'Boot from EFI file' in theE BIOS setup. Do you see Debian there?

There is no 'Boot from EFI file' option on the bios screen. I was talking about 'grub screen'.
Yeah, I took out the disk from which Debian was installed before I sent it to the warranty. I use a single disc. I was using it as a dual boot. Previously on the boot manager screen windows ubuntu debian appeared. No debian now.

I partially solved the problem. I was able to open debian from boot from efi file. Anyway, I'm setting up a new system. Thanks for your help.
http://imgbox.com/hzavemu to
http://imgbox.com/nddlf5tj
http://imgbox.com/rjnacsu4
http://imgbox.com/3u9evozd
http://imgbox.com/lkeodzmq

The option is actually not in the BIOS setup, but on boot hit the Esc key and there will be several options including F10 for BIOS and F9 for boot options which has the Boot from EFI file option which I see you have found.