Using cable remote when box is in another room

Try to set the remote control; with an other code said for your device. Set-up (Programming) procedure is too much to type in here, and is not practical and it will differ brand-to-brand remote controls. If you wish to get more; check the sites linked here. It has set-up code list & set-up procedure to many popular brand remote controls. One among it has general set-up codes to check with TVs and other devices are given, in the order of the 'device's brand name list' in alphabetical order. Pull up older posts. Search the sites by type in the brand name to your device in its search box at the top right part of the display window. It will help you to find the document easily.
http://remotesearch.blogspot.com/
http://electronicshelponline.blogspot.com/
http://electrohelponline.blogspot.com/

Are you using a remote, or try to turn on manually. If your remote does not work, it needs to be programed to your t.v. And all remotes and t.v.s have different codes. Sometimes your cable provider will help you program your remote, or reset your cable box. My remote for my cable was not programmed, so I had to read the instructions myself to get the remote to work with the cable box channels.

You need to turn on the cable box again. Make sure to select the right source again for your tv.

if its an ATT remote the channel changing is a function of the cable box--you may wont to reboot the cable box if the channels still dont change i would contact or cable provider

if u are using the cable input make sure u are un chanel 3 , other way to connect the cable box is thrught the video 1

I have the 55 inch. try using 246. That works on mine. if not try 028,164,208,066
let me know if that works for ya
ric
another note, are you using the flash on the back of your cable box or do you have a sensor in front of the DVR box?

Okay, after searching for a bit, I found a site that sells one for $19.95.

Click here.

It says that this replacement is exact function of original.

its probably the led in the remoter, check with a camera on a phone point the camera at the remote if its dim, that's the problem, it could also be a damaged battery in the remote.

Unfortunately, there is no solution for this issue.  The remote control sends out an infrared signal, which can be picked up as far as 40' away from the device.  And to make things worse, the signal will reflect off any surface such as glass, mirrors, or even brightly painted walls.
The only way to solve the problem is to block the path of the beam to the other room.  This may require closing a door or drawing heavy drapes closed.

First of all try getting a Symphonic remote - http://www.miracleremote.com/ not that expensive. Then you can access all areas of the TV, including all sub menus and see how the audio is set-up.. Could be you have it in SAP mode, (Second Audio Programming), in which case you will hear nothing...
Bill