LG 42PB4D 42 in. Plasma HDTV "gem issues" Questions

...my channels.what do u think is the problem. apart from loosing tv channel memory ,it workes like a gem. Something in the set's microprocessor (just like a computer only smaller) serves this ...

I have an LG LCD TV and receive perfect video on CH 73 Mate and CH 90 Gem but receive no audio for either. Model code is 42LY3DE - AA.AAUYLH This is a real odd problem. If these are the only channels ...

had no sound on 7 mate, then lost sound on gem, tried auto tuning then lost picture and sound of all 3 chanels of sbs. so then went under options and factory reset. Still have no sound on gem an 7mate

...in tasmania and i can't get sound on new digital channel 90 (gem) is there an upgrade i can do myself? LG have a firmware upgrade on thier website for this issues. I did it on mine - worked a