Raspberry Pi4 :
it doesn't start

Why doesn't your Pi start?

On the Raspberry, the causes are multiple. But not so many. Explanation...

- First of all, know that the RED diode corresponds to the power supply.

- The Pi no longer starts, no red light at all, or electrical crash of the RPi. This is due to the alimentation.

- This must be at least 15W by USB-C. Here the official charger recommended by the Rpi foundation. Here the official charger recommended by the Rpi foundation.

Here the GREEN diode flashes, here's what it corresponds to :

• 3 FLASHS :

  The start.elf file could not be found by the machine.

• 4 FLASHS :

  The start.elf exists, but it is corrupt. Verified NOOBS and your installation on your SD card.

• 7 FLASHS :

  The kernel.img file, which corresponds to Linux system is not found by the machine

• 8 FLASHS :

  Corresponds here, the SD card cannot be found, still by the machine.