Everyone may have this issue, especially when we start to use a Raspberry Pi
I have had many cases like this at the beginning, and it still happens occasionally when I try something new (new system or hardware for example)
I will start here a list of the most common reasons why the Raspberry Pi won’t boot sometimes, and I hope that you can complete it in the comments section!

Why is my Raspberry Pi not Booting?
Many reasons are possible, but we can sort these issues in a few categories:
– Cabling issues
– Hardware problem (power supply or SD card in general)
– Incompatible operating system
– Corrupted files on your SD card