Suddenly turned off and after a few strokes in the drum, is connected only to the mains, and began to do the following:
— Enable button/power indicator
Splash monitor (Flatron) for a split second
— Turn off and again
Judging by the symptoms, the power supply goes into protection, maybe burned down one of the lamps of the backlight.
Lamp or changing, or "emulates" (replaced by a suitable high voltage capacitor for example).
You might also replace the LED.
But if the question arose, "what about him", it is better in service.
There is also a chance that flew firmware, then replace the memory and fill firmware.
thea.Gusikows answered on July 2nd 19 at 17:37
Take it to repair.
Somewhere in capacitors for example, could fail. Not once faced. Buy in this case, a new monitor, the easiest to repair, and after repair for sale at the flea market spread. Just "another" I don't need, and after renovation live for a long time, as practice shows.
Carmela.Stamm45 answered on July 2nd 19 at 17:39
Power supply the monitor could have a real one and when now and does not hold the load.