Volume lock of philips vardan tv

I hv philips 21RF vardaan TV ,there is sound on AV channel. and the picture is blinking. even some menu setting have changed.. i tried using the service menu but cudnt understand anything. 2 new av channels have come.. av2 and front which were not present before. sound is not coming even on the other channels but picture is fine on them. only on the av1 channel it is blinking., the philips technision had solved this prob once by pressing some code by remote and i don't know the system code

062596+menu will lead u to the company menu.
in the options menu: Option 1-128

2-215
3-065
4-000
5-192
6-144
7-012

Philips zappa sound is very low what to do