not sure default values or not, my lc50ua6800x show this.

1/18
MAIN VERSION 30800 OTT1.180130.001
BOOT VERSION 3.7
T-CON VERSION ------
FRC VERSION 4100 0148 FFFFFFFF E3225580
HDMI SW VERSION 0
LED CON VERSION 0000000000
LAMP ERROR 0
ERROR STANDBY CAUSE 00 00 00 00

2/18
INDUSTRY INIT NO
BACKLIGHT ACUTIME 166H 15M
RESET NO
LAMP ERROR RESET NO
ERROR STANDBY CAUSE NO
RESET
TIME COUNTER 19
TIME COUNTER RESET NO

3/18
VCOM ADJ ------

4/18
LEV1 0
LEV2 0
LEV3 0
LEV4 40
LEV5 115
LEV6 166
LEV7 229
WHITE BALANCE PRESET NO
LOAD

5/18
MG1R 0
MG1G 0
MG1B 0
MG2R 0
MG2G 0
MG2B 0
MG3R 0
MG3G 0
MG3B 0

6/18
MG4R 585
MG4G 614
MG4B 606
MG5R 1660
MG5G 1767
MG5B 1809
MG6R 2397
MG6G 2551
MG6B 2629

7/18
MG7R 3329
MG7G 3520
MG7B 3664

8/18
LO1R 320
LO1G 320
LO1B 320
LO2R 704
LO2G 704
LO2B 704
LO3R 1152
LO3G 1152
LO3B 1152

9/18
LO4R 1472
LO4G 1472
LO4B 1472
LO5R 2368
LO5G 2368
LO5B 2368
LO6R 3136
LO6G 3136
LO6B 3136

10/18
LO7R 3904
LO7G 3904
LO7B 3904

11/18
CD MIN 3
CD MID1 0
CD MID2 0
CD MID3 0
CD MID4 57
CD MID5 577
CD MID6 1269
CD MID7 2552
CD MAX 3209

12/18
VAL1 100
VAL2 100
VAL3 100
VAL4 101
VAL5 102
VAL6 101
VAL7 101
GAMMA ADJ TEMP 465

13/18
MONITOR TIMEOUT YES

14/18
LCD TEST PATTERN1 0
LCD TEST PATTERN2 0
TV TEST PATTERN OFF

15/18
DUMMY

16/18
USB BACKUP NO
USB RESTORE NO

17/18
PLAYREADY KEY Playready model key OK
WIDEVIDE KEY LCDTVhiddenhidden
WV SECURESTOP KEY WVSecureStop model key OK
DTCP-IP KEY ------
Cl+ KEY ------
HDCP 1.4 KEY 19-00-01-6F-54
HDCP 2.2 KEY 14000459D5 6BD808F4D3
MARLIN KEY ------
SERIAL NO hiddenhidden
MAC ADDRESS hiddenhidden

18/18
MODEL UA6800X
PANEL SIZE 50
VOLUME TYPE TYPE1
DESTINATION GROUP7
USB PORT TYPE HOST

Can share how to go to this menu?