LG GU280 Service Manual page 86

5.2.1 Connecting to PC
Click on the Select Port
to be connected for downloading images. Then click on the
(The port number(COM7) shall be different from that of the port number in the snapshot.)
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Only for training and service purposes
and then Select Port window will be pop up. Check if state shows
Connect button.
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5. Downloading
Enable for the port
LGE Internal Use Only