Just not to "master" Sergei, he can fix any problem, but... Only "in theory", as it turned out in practice, this is a layman, do not waste time and money, there are other services.
I shouldn't have read the truthful reviews before.
I turned to an electrician, did not help, I looked at the universal cord, as a result, 25 rubles were stolen, my time was killed.
But on their left there is Alexey, he is a professional in his field and just a normal guy