Touchscreen not responding most of the time after replacement

Hi all, recently I replaced LCD and digitizer by myself because they were cracked. After replacement LCD works just fine but there is problem with digitizer. After I turned the phone on it was not working so I restarted it several times, even disconnected digitizer from the motherboard and connected again, made soft resetes - nothing works. What is even more ridiculous I noticed that after restarting phone several times touchscreen starts working but after next restart or turn off it stops responding and the process repeats until next miracle happens.

Does anybody have same issue or know solution?