In TV settings, check HbbTV options (ON or OFF). Some of the DVB-T2 channels, here in Serbia, were making that my 42LB650V crash/reboot constantly. I had to turn off HbbTV option. After that there was no more crashes. Let me know whether this can help you too...
DVB-T2 crashes TV
in LG TV and LG webOS Smart TV Discussion
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In TV settings, check HbbTV options (ON or OFF). Some of the DVB-T2 channels, here in Serbia, were making that my 42LB650V crash/reboot constantly. I had to turn off HbbTV option. After that there was no more crashes. Let me know whether this can help you too...