LG 50PX950 Service Manual page 13

Select download file (epk file)
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After download is finished, remove the USB stick.
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Press "IN-START" key of ADJ remote control, check the
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S/W version.
CAUTION
- DO NOT REMOVE USB MEMORY CARD FROM USB PORT
WHEN YOU FIND BELOW DESCRIPTION
- " Do not remove the memory card from the port! "
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Only for training and service purposes
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