LG Electronics 14" Flatron 29" C TV
AV Mode Not Storing or Saving

Dear Sir,

We have purchsed 14" Flateron TV and 29" Flateron TV in which

the AV Mode is not saving it will go to AV mode manually but again reset if power off by default goes to RF Mode only

IN SETUP AV mode saving option is given.

But Not WORKING

I am Using SET - TOP BOX (DTH)

I am facing Alot of problem Please Resolve immdtly