Logitech Z906 Problem, Led is Lit five and AUX

Excellent speaker system but prone to elementary sore that manifests itself when the manufacturer presses on the normal components.
How does the fault appear:
If you don’t turn on the system for a long time, and then turn it on (it’s a long day or more), it will turn on and even work, but not for a long time, maybe 10 minutes, or maybe an hour. After freezes and no longer responds to commands from the control unit. After turning off the power and then turning on the control unit, two indicators light up, five digits and AUX, these indicators will tell us the error code, power error.
In our case, the problem with the power supply of the main control board (which is in the subwoofer), and, mediocrely, with the power supply to which the preventive maintenance was done, will not be worse, it will probably work longer or maybe not.