Endless installation of MacOS X Lion, what to do?

Question

macOS

Good afternoon. A friend bought a macbook, decided to roll back to the initial version (says there were some problems with installing the latest Sierra). Through Command + R, when loading, I formatted the disk, then a clean installation of the first Lion system. The declared hour passed, and the program again showed that there was an hour left. Again passed and again the countdown began again. Question for the connoisseurs. How to be and what to do?

Answer 1

Try CMD+N and network boot the original OS.
If it does not help, there is a high probability of problems with iron.

Answer 2

What laptop model?
Just as an option, if the macbook is on the MBP repair program list , then perhaps its discrete video card is buggy.
For me, this manifested itself in a sudden freeze during operation, an endless reboot when loading the OS at 2/3. I thought that the OS was broken, but the attempt to rearrange was also unsuccessful - the same hang during installation;
You can check the health of the video card using Apple Service Diagnostics for your model (easily searched on a popular torrent tracker);

Answer 3

Something I think the installation had to go through, and only then the problem would come out in the video this time. And two, the diagnostics about which they write here more often does not reveal this problem, writes that everything is OK, I had to check it 4 times until I got an error. As for me, something with a screw, reset NVRAM and try again, there is still a vario to take the same firmware and connect it by wire to the problematic