Some time ago I bought a Raspberry Pi4 4GB to make my home server; I set everything properly (it was working just fine).
Then, one day, the power went out and after I switched the Raspberry back on it started to randomly switch itself off without apparent reason.
Today, trying to make it work properly again, I re-flashed the sd card with the new version of Raspian Buster but when I connected it to the psu just the red led switched on.
I read everything on the thread "The Boot Problems Sticky" (https://www.raspberrypi.org/forums/view ... 84#p437084
), so I tried to reinstall the bootloader following this instructions https://www.raspberrypi.org/documentati ... teeprom.md
, but also with the sd with the recovery image I had the same results.
Thanks for the attention