Random no sound/black screen flicker

[Simonb73]

The handshake issue for me disappeared when I switched the sky Q box to 1080 rather than 2160. Also the picture improved on normal HD. 

I reset the TV (LG G4) as advised by LG and have had no trouble since. Cancelled the Ultra HD from Sky too. 

[Simonb73]

Just to add to the above, the handshake did improve when 8-bit was set instead of 10-bit on the 4K resolution. 

[MrWinn]

Just a TV reset to factory fixed it for me, until a TV software update comes along and than another TV reset. I have switched off auto updates for now.

Ultra HD is working fine via Sky.

[martin+i]

 Bought a new lg g4 sound and picture dropouts on dvd changed hdmi lead for a 8k ,have not seen a recurrence but need to recheck on a dvd but it may have worked , similar on sky box , just wondering if a new cable is req , also on these new lg g4 a1 tvs , if you use a1 to adjust sound it will perfect it but when you switch on next day you lose the setting , a1 does not necessarily set it back as before , waste of time using it if after 2 hours of messing about next day , settings gone , i went through trustpilot using all the major tv brands all show a high level of dissatisfaction , all to quick to get on the market without testing to req level ?, [ ex quality control rtd ]

[PaulAnna]

Can you give us a step by step guide on how you fixed this problem 

[martin+i]

had to get rid off lg tv in the end it was anything but smart , regarding interference with a dvd player , i had a 8k lead buy chance and changed the lead between the dvd player and the tv , but the tv was useless , sent it back and got a sony bravia , no issues , as 8k leads are backwards compatible  you can use them without issues , well worth the extra cost if it saves you hours every day resetting issues . sony very good as hdmi connections have frequency details . no issues anymore with interference with sky ,  so far .