This is my personal experience with Lenovo laptop that I was able to switch on but thereafter it was just showing a black screen. Even the boot options were not appearing on pressing F2, F8 or F10.
Before this issue, my laptop had suddenly crashed with "Default boot device missing or Boot failed" message, and after this, it never booted to Windows, just gave this same error message every time.
I created a bootable USB pen drive with Windows 11 and then used this USB to boot the laptop into Windows Installation mode. However, instead of triggering the install, I first went into repair options. The repair system option also failed to work. Next I opened the command line tool in diagnostic tools and ran the "diskpart" command and then "list volume", where I could see the SSD listed as one of the volumes. So I thought to try to reinstall windows in SSD, but even that failed as the SSD suddenly disappeared every time the installation started.
This is when I decided to format the SSD using the Windows Installation option. The SSD still kept on disappearing as soon as installation started, giving the message like "Media not found". However, when I restarted the system now, there was no Windows Installation screen, and no boot options on pressing F2, F8, or F10. Just a blank, black screen that won't go away.
At this point, I had no idea why this was happening, why suddenly this black screen without any option to see boot screen or installation screen. This is when I decided to open my laptop and take a look inside.
I had a suspicion that the issue was most likely with the SSD, which seems to have been corrupted or malfunctioning. In my case, since the laptop was not under warranty, I thought to open it and check it out myself before going to the service center, as I was curious about what the issue may be. Your case may be different, and there is always a chance that you will make things worse after opening your system, so please take a decision based on your judgement, and not based on this article :)
After opening my laptop and removing the SSD I was able to see the boot options again! Viola! Since my Windows operating system was installed on the SSD, the laptop could no longer boot Windows. Thankfully, I had stored all of my important files in HDD, using SSD just for Windows bootup. So my immediate priority was to backup all the data from HDD before doing anything else.
I connected another external Hard Disk to the laptop to create a backup. Using the xcopy command, I copied all the files from the laptop's HDD to the external hard disk.
Once the backup was safely created, I had two options. Either erase the laptop's HDD and install Windows on it, or order a new SSD and install Windows on that SSD. Since I rather liked the super fast boot time provided by the previous SSD, I decided to buy a new SSD with enough capacity to run Windows, and then keep the Hard Disk with its current data untouched.
Once the new SSD was plugged in, I was able to reinstall Windows on it. Within an hour, my system was back online!