Yellow stopped working

It did not work right away, the CM4 board was not seated completely.
After fixing that, it worked just fine until a week ago with a Samsung 970EVO Plus 256GB.
After compiling some stuff with Esphome, it crashed, stopped and only the red light was on. I’ve tried once again the giggle fix, red and green where on for a while, and worked afterwards. I connected the USB-serial connection, but it works only after the CM starts, so nothing about the wait before it starts.
Today it crashed, no lights at all. not even the silabs mini light.
I’ve checked the 12V power supply - OK.
checked the tension in various points it has 12, 5 and 3 V.
Where I can find a schematic of the board?


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