Hello and thanks for info.
Indeed I am having fun. I also thought about the ideea that the failed power supply also damaged (blew)other boards. The thing is that I have checked (optically) and made some measurement on some diodes, capacitors (mostly on electrolythic capacitors), tracks, but nothing. Everything looks ok. One thing more: after calibration error, I should introduce the troubleshooting password SI5XX but I don't know the exact XX value.
Have a nice day