Mic won't work at auxiliary mode

SOURCE: No Digital TV Picture LG DAT-250 DVD Home Theater with Digital TV Receiver

Did you check PAL/NTSC settings?

SOURCE: LG Home Theater System LHT754 no sound

All you are currently doing is getting sound OUT from the LG HT system. If you want sound from your cable or satellite, you have to run a seperate audio cable into the back of the LG system. If you are running a cable line straight into the TV you need to run an audio cable OUT of the TV so you get sound via the LG system.

SOURCE: dvd does not load

some times its because of the CD (it cannot read the CD) all you have to do is try a different range of CD's to see what the prob is if it still doesnt read it may be coz of a scratched CD / Lens!!!!

SOURCE: no sound though home theater when watching tv

There is an orange button on the remote, half way down in the middle. I belive it has orange lettering and says something like "TV-?" press that, and the sound should start to come through your speaker system. You can then use the original remote that came with your TV and turn the sound off on the TV to use just the theatre system. I noticed that if you use the TV speakers in conjunction with the theatre system, that it echo's.

SOURCE: v ipod mode in Samsung HT-Z420 home theater system not working

Plug a yellow video cable into the TV (IN) and the Sound system (Out) then go onto AV1 on the TV or which ever port you plugged the cable into and play a movie and u can see it. A menu doesnt come up like the A ipod funtion so it comes up no signal until u play an actual movie on the ipod. If u dont have a yellow video cable i think u can use the white or red audio ones.