55LV3700 (CHASSIS:LA12B) - LG TV Service Manual (repair manual). Page 72
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22. 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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Random:
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MHC-GN1000D, SS-CT1000D, SS-CT999D, SS-GN1000D, SS-GN1000S, SS-GN999D, SS-GN999S, SS-RSX1000D, SS-RSX999D, SS-WGV1000D, SS-WGV999D
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DCR-VX2000, DCR-VX2000E
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KP-51HW40, KP-57HW40 (serv.man5)
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AR-M150 (serv.man19)