Have I correctly determined the reason why the computer does not work?

Question

Hard disks

MacBook on OS X hung tightly while working. The Force Quit Programs window did not open. The keyboard and mouse did not react at all. Turned off by holding the power button. When turned on, a question mark appeared on the background of a gray folder. They blinked non-stop. I googled the problem, found a description on the Apple website. Waited 10 minutes, blinking did not stop. Rebooted with option pressed. Neither the main partition nor the recovery partition was found. But he offered recovery via the Internet. Pushed him. Went into Disk Utility. The hard drive is not visible. I tried to run a reinstall of OS X. There is also no hard drive. From Internet recovery also tried to select a boot volume - also empty.
I concluded that the hard drive just died at one point. Right? Could it be something else?

Answer 1

Hold D at startup and check computer status - will show hardware problems

Answer 2

Most likely the disk has failed.
To make sure, you can connect the disk to a regular computer and check it with Victoria under DOS.
You also need to specify the model, if it is in the region of 2008-2010, then there were chipsets from Nvidia, which can be weird before death.