What happen. One day I came to the PC, turned on the monitor and the screen showed nothing. Besides the power button on the front of the monitor is blue LED, that periodically flashed. Turn on/off didn't help. If i left the monitor in this state long time (15-40 minutes), then it start and work the rest of the day. This is repeated each time the monitor starts or woke up from standby state.
Moreover, it seemed to me that the starting time is prolonged every day.
On the Internet I read that the usual failure of LCD monitors are faulty electrolytic capacitors. I said, can not turn on power, LED blinks, like the power supply cannot start. Look inside a faulty capacitor is immediately recognizable. What can you lose ?
In addition, the monitor cost at the time of purchase 14000,- so I did not want to throw it away.
I dismantled the rear cover of the monitor, underneath the metal cover of electronics and bingo! Three capacitors blown up like a rabbit that eaten caterpillar. Even slightly from one issued by an electrolyte. Two capacitors are 470uF/25V and one is 1500uF/10V. I have a lot of 470uF/25V in my home storage, the third not. I have an old motherboard, which has a few capacitors 1500uF/6,3V, but I was too lazy to measure the voltage to see I can use it or not, so I remember my rather poor knowledge of electronics from school and I made the necessary capacity by two parallel connected capacitors 1000uF and 470uF / 10V and 25V respectively.
And wonder of wonders, it works. And then that today's electronics can no longer be repaired and throws it away replaced by a new one. These are just marketing pressures of sales department.
Repair brother comes to CZK 20, - and an hour and a half of work.
WARNING !!!!! The high voltage is in this monitor and you will work directly with its source. Therefore, make sure the principles of electrical safety, and if you do not have electrical training or experience at least, prefer to ask an experienced colleague or friend for help.