15LS1R-MG (CHASSIS:CL-81) - LG TV Service Manual (repair manual). Page 12

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Push IN-START => IN-STOP => TILT at Service remocon in order then SET-ON LED(Green) will be blinking. 
*If ST-BY(Red) blinks, please push TILT key once.

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1. After LED checking, execute "WISP" program. 
2. Compare LOC version in BOM with version of hexfile.
3. Push "Browse…" in WISP program and select hex file.(1)

4. Push "Auto Execute" after loading file.(2)
5. After Writing Flash memory, check OK message. (3)
6. After finishing ISP, turn OFF Main Power AC switch and then turn ON the switch.
7. Red LED is blinking during writing default value in EEPROM(24C32) after turn on the switch.
8. ALL LOC ISP process is finished when Red LED is off and Green LED is ON.
9. After ISP, automatically input source change "AV2" and II_SW set to "0")

1. Connect between

PC for ISP and Parallel port Jig though parallel port and USB cable.
Parallel port Jig and Down-Load JIG though D-sub port. 

2. After set on Main board on pull the Lever at right, turn on ISP Down-Load JIG.(Push the MAIN POWER ON/OFF.)