you are using standard cable and not over the air signals to the
tv tuner directly
do a channel scan with the tv set for over the air and then for cable
these products were known for bad tuners and gemstar modules
the rca boxes are in french and pictures of dogs on them
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Do you mean the channels from the internal tuner which would be channels 22 to 68, or do you mean satelite channels, as I do not know whether this set has a built in satelite receiver?
Satelite broadcasters are often changing frequencies or satelites.-
Programs come and go!
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Just check this TV by connecting it to on-air programs. Connect external antenna to it, and make an auto tune function. Refer to its user manual for details. If TV do not tune in to on-air channels too, the tuner to your Tv should be checked and replaced. If it receives on-air channels, and only cable channels are missing, you must contact the service provider to your cable connection.
I had the same problem, had a universal DirecTV remote that was able to control the volume/mute, power and channels (both TV and DirecTV), but the input button didn't work. There was no av/tv button on the front of the tv, and the autoregistration of channels didn't pickup the gamecube on the AV channel. What solved it was simply to press "00". I couldn't believe it, but it was that simple. Hope this helps you like it helped me, since the tv was not going to be of much use since we were using the RCA inputs, not the coax. Didn't want to try to conver the RCA to coax either.
I had the same issue with this same receiver. Unfortunately this is a known problem with this receiver and Yamaha knows about it. The usual fix is to have the input RCA connections in the back replaced to some updated ones. What has happened is that there is a shirt created using the current RCA input jacks and it is actually turning the internal amplifier off to that particular channel or channels. My local stereo shop ( who is a Yamaha authorized service center) knew about this and replaced mine to the tune of $200.00. Good luck
Try to tune the tv in manual search method. If you get means store it manually. Nothing to worry. This is due to malfunction in AUTOMATIC FREQUENCY CONTROL COIL weak. Even you won"t get channels in manual tunning method. Change tuner and afc coil. Problem solved.