LG 42LG5020 negative picture

[Keith]

This set has a negative / washed out picture. I thought I read somewhere about USB firmware updates for these, or maybe it was for other sets!. Anyway, can't find anywhere to download firmware and the manual I have only refers to service by interface and PC

Will give it a while to see if any one has a solution, if not I will erase the eeprom and hope!!

Thanks

Keith