LG 42PC3RA Service Manual page 17

(7) Double click the download file low then, "edit" window will be
opened.
(8) Chick the choice button In the "edit window", then "file choice
window' will be opened.
(9) Choose the Hex file in folder and execute downloading with
click "open button".
(10) Click OK button at the "edit window".
(11) Under Downloading progress.
(12) If download is failed, for example "No acknowledge from
slave", execute download again from (1).
5. Channel Memory Download
(1) Connect the download jig to D-sub jack.
(2) `Execute 'Channal.vi2c' program in PC, then a main widow
will be opened.
(3) Push the button change and select the Channel memory
data.
(4) Push the Update NVM from File.