SONY TV will not change the VOL or CH

[ToeJoe]

I have a SONY TV Model KDL40R350B that will not change the volume or the
channels by remote and you cannot change it in the TV ether.

I do not know what the problem is.

A few miniatures before you could change them both.
I unplugged the TV thought that that would work and plugged it back in still nothing changed.
I only had the TV since July of 2014.

[downunder]

Should not this TV be covered by manufacturer's warranty? 12 months, is it not?

[michael first]

Hi.ToeJoe
tv locked, so you should try to upgrade the software at the last version,but first you should unlock it trying to access the service menu(display-5-vol+-power);you will not succeed the first time but you have to repeat
again and again until the set reacts and enters the service menu.Have a good time.