Our TV remote turns the set on and off and raises or lowers the volume, but will not let us change channels. We put new batteries in the remote and tried changing channels manually.

if universal remote reprogram code .

if original remote for device its gone bad and needs replace or get universal remote

REMOTE CODES COM

two choices, get the keyboard on the set repaired or get an original sharp remote which among remotes is not too expensive.

Unfortunately the bandwidths of remotes often crossover. You can put tape over the ir sensor on the ac.

Lots of possibilities. If you are using the remote, try also using buttons on the TV to change channels. If TV buttons work, the remote is broken or perhaps try changing batteries and cleaning battery contacts on the remote. If neither work, lots of other things to try. You may need to set preselect channels, so your TV thinks there is only one channel out there until you do. If you are on a cable box you just need channel 3 and change channels on the cable box. I can't tell what you mean by "audio changes with the channel" ... if you mean that when you try to advance channels, it increases volume and moving down in channels lowers volume that would be strange -- if you are using a programable remote it might not be set correctly (try another programming code). The "blurred" picture is probably symptomatic of having the set on the wrong channel, and if you could set channel it might clear up ... I'd start with getting channels to change. If you need more help, give the brand and model of TV, say if you are using a remote (original or programable), and what the 'audio changes' comment means in more detail. Probably worst case is that your tuner circuit is fried, but don't assume that without more diagnostic.

Hi, well you can do everything from the axtual TV itself, have a look on the TV you will find a setof buttons/keys. these allow you to controll almost everything that the remote can do.
here you can change channel change volume etc.
The buttons usually there are 6- 7 marked On/Off, Channel up/down, Volume Up/Down, Enter/OK & Menu. Now pressing these will bring up the onscreen display and you can adjust what you wish.
Now with the remote, it's probably best to obtain a new one..
Sometimes disassembly may fix it, but it sounds like it has a bad problem.
To ensure it doesn't interfere remove the batteries.

Open the thing up and clean off all the dirt on the volume buttons with a dry rag and clean the remote sensor.  Put in fresh batteries and now give it a try.

I think you'll find that the tv is at fault. I, unfortunately bought one of these **** things as well. If you try to turn the channel, or volume, at the tv itself, you'll find that it won't work either. Seems to happen when switching between HD and regular programming a lot, but can happen at any time. You get what you ( and I ) paid for....

Most televisions and monitors have a menu button next to the power, volume, and channel buttons on the face, top, or side of the set. It can be a pain but you can usually press the menu button to bring the menu up and then select and change settings by pressing menu again to choose a setting and using the channel and/or volume up and down buttons to raise or lower the setting. The exact function varies based on the set so you may need to fiddle around a bit. Unfortunately some sets do require the remote to perform some functions.

If you have a Universal remote ask here for the remote codes. They helped me alread a lot!

i put an extende piece of cable on my antena for second set raised it to same hieght as my tv in rear so ya dont see works great now