My x700 stops playing 4k discs while watching the Equaliser it stopped playing at 1 hour 35 mins, also playing Captain Marvel it stoped playing after 2 hours 10 mins in both cases could not fast forward or get them to move on noted the time by the display button, this problem has happened in the past on other films but 2 in 2 days??

Lucky to have my old x800 no problem with this player at least I know the discs are ok 

Any one else had this problem and is there a way of solving it