47LX9500-UA (CHASSIS:LA02R) - LG TV Service Manual (repair manual). Page 105

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27. Trouble shooting - SW download
If SW update screen appears, 
push the OK button.
The latest S/W put in the ‘LG DTV’ folder of USB Memory
USB connects to USB jack for service.
The SW update is finished, please check new SW version by 
in-start menu.
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