We have a reported AD BOARD: BTA-4200 (75") DP/DVI/HDMI/VGA B4200004+WLUHD 001 for the P750QVN02.1 losing input settings after the reboot was made.
A: AD board auto detects the input signal as the default setting for input signal is “ AUTO SELECT”.
I don’t know if you selected the other.
Please refer to the attached OSD menu to correct this problem.