Videocon Champ 14 Av solution

If your videocon champ 14 Rf or cable tv ok but AV not working mean when you press AV button on your remote it does not respons.
I first change a blank memory ic
2nd croma ic LA76931K 7N 5AP3
When it in same fault
3rd goto service mode
Menu 1947
Goto page no 7 by press vol+
There a option opt av system
Change this value zero to one
Now exit servise menu press standby button
Not you can enjoy AV now
If any query comment me in down comment box.