TV locks up most of the time now when switched on. Remote won't work so have to use on off switch on TV and then take off standby via remote. It will lock straight away onto one channel, sometimes losing audio, or lock after a short period. Trying to alter volume or channel via remote or tv buttons doesn't work. The sensor light may flash and tv catch upwith a previous button press when locked or may unlock itself for a short period. Just wondering if anyone else has experienced this and is it a costly repair, which on a 2 year old 28" tv may be cheaper to just replace rather than fix. Thanks in advance for any help.