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when you unzip the file you may need to put it into a file called "upgrades". Try an empty USB stick (size should not matter) and put the autorun file into the upgrades file.
if you have the updated firmware on CD put it in PC and connect to TV via the connection cables. The instructions for upgrading should have been supplied
It may be a firmware issue if hdmi works with other items such as playstation.
If no hdmi the main Pcb hdmi ports are bad and the main Pcb would have to be replaced.
Consumers cannot upgrade the firmware so a shop would be the only option.
In the menue go to Update firmware. It will display the firmware number. reply no when it ask if you want to upgrade. Contact LG any tell them the numbers. They will tell you if firmware upgrade is current or not. They will send you the upgrade if it's needed.
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