My MU6600 Just updated and I got black flash within five minutes of having PC on through it, it only ever flashed before on PS4 PRO and then it would only do it twice in 30 minutes and not do it again until TV turned off.
After last two updates I was sometimes getting colour lines pixel wide from top to bottom like the colour is out of line but only happened about twice a week and when it did happen it was after pressing home button but after turning TV off and on again it wouldn't happen for few days, lets hope this new update fixes it.
ZACHSP8, color lines - there is no possibility to eliminate it programmatically, by updating the firmware. This is a hardware defect in the matrix. In any case, your TV will come to an end.
New to the forum but have just come back from holiday to see my 55MU7070 has updated to 1240.7
Hard to say what it's improved but I've now had to turn my brightness down on night time viewing.
Picture seems sharper and a lot brighter. Especially HDR where I've found it to be very dark before.