support offered to buy a new amplifier. I have a good friend who understands electronics. We dismantled everything and on the control board, non-soldered contacts on the memory board were noticed. There simply was no solder, this is a factory marriage. On the other board, on the contrary, there was a short circuit on two contacts. Component quality is great, circuitry is great, build quality control is terrible. The problem disappeared after soldering the contacts, but after 3-4 days it returned. As soon as you press on the components of the board, it starts working.
They didn’t get to the front panel, but it looks like there are problems there too.