The battries in remote are new. the remote wont change channels or turn power on and off.The buttons on the tv set wont work either.It keeps saying child lock is on.

Pull out the power plug of your TV and don't use it for few minutes. Remove batteries from your remote and keep it without batteries for few minutes. After about 15 minutes your TV and remove both will work fine.

Yeah you were mislead. Those switches are known trouble makers. You can just leave the switches disconnected and the set will operate just fine with the remote with no problems. If you want to fix the control panel, just replace all the switches on it. They are cheap. The Mitsubishi part number for the switches is 432P089010

It could be a stuck button on the set. check to make sure they all feel the same.. If one don't feel right try to free it .. If a button is stuck it wont let any of the others work or the remote.

Press tv on the Sky remote

press and hold select and red until the led blinks twice
type in 0 0 6 0
press the power button, if the tv turns off then the press select and the remote should work all the tv functions.

If the tv does not turn off then press tv then the power button and keep doing this until the tv turns off, once it turns off press select and it should work.

If you have any problems let me know

Dazz

Purchased a new tv
Thanks

Out of 30 years in the repair field, I have seen this problem maybe 4 times. Once was a stuck button on the keypad of the tv. The other time was a second remote control with a book sitting on it and it would turn the tv on and off when someone would move something on the coffee table, another time was a bad solder connections on the microprocessor on the keypad circuit board and the last time was from a humorous neighbor in an apartment complex who thought he was funny who had an all in one remote control programmed for his neighbor's tv set.

Perhaps you can try what I do when my KV24FV300 runs through channels and will not stop.  Hard to watch and remote will not work.  Nothing works but on and off from set. 

Sony Says:  Take all batteries out of ALL remotes that you use in any way for that set, VCR, etc.  ALL batteries out.  Turn TV off at set.  Unplug TV.  Wait at least 15 minutes then replace all batteries in ALL remotes.  Plug TV back in and turn TV on from set.

Maybe, just maybe it will work.  If it does not work why not call Sony, they always say that cannot happen but they have a solution for it.

[email protected]

same frustrating symptoms on brand new 42inch here! tv just turns itself off sometimes without warning or if changing to certain channels. leaves red light flashing for a while then red light goes away. any attempts with remote gives flashing green liht on tv. manual power off and on restarts tv but auto off again. found while manual power on keep changing channel on remote till stable picture appears. then use remote to shut down tv - solid red light indicates standby mode. then use remote to turn on again... till next time it happens. but what is technical fault??

you need to program your remote control. take the battaries out. and maually turn the tv on. then hit the source you want to view. for example, I want to control the tv set. I push, code search and hold it then push the source button and then release the source button and then release the code search button. now, aim at the tv and then keep pressing power button till it goes off. when the tv is off, hit return or set or something like that.( every remote has different calling for it but still the same function) it should work. try it and let me know.

the channel down button is stuck on, you need to replace this switch internaly to the set.