Why all my cables channels not working - RCA R52WM24 52" HDTV Projection Television

Cable box not changing channels on VIZIO TV - Comcast Help and ...

forums.xfinity.com/.../Cable-box-not-changing-channels...TV/.../164607...

Apr 3, 2013 - I was able to connect my cable box and activate it without an issue. ... My problem lies in that the cable box will not change channels. Channel 8 comes in ..... I just unplugged the DTA ( you already did) and I let it sit for a while. No Audio with cable tv
Nov 15, 2012
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Connecting Cable Service, Satellite Service, or Antenna ...

vizhdtv.com/connecting-cable-service-satellite-service-or-antenna-chann...

Mar 10, 2015 - If you are connecting your cable or satellite box using an HDMI cordyou will ... You just need to change the input of your TV then scan for channels. ... Except the Vizio TV will not receive a channel that all the other TVs get.

Where are you connected---to the coax cable fitting or via the rear audio and video inputs?

If your using digital cable it will only record channel 3 or 4 depending on what your cable box is set to...In order for it to record different channels it needs a cable source plugged directly into it. You will only be able to record standard cable channels 1-125. If it's digital cable forget about... you can only record it with channel 3/4 a solution to this would be using a 2nd digital box.. "auto-programming" may be limited even with a 2nd cable box. If your only using standard cable 1-125... you can use the TV/VCR button it will switch between the tuner of the TV & VCR allowing you to record while you watch a different show... keep in mind this won't work for digital channels which if I'm not mistaken comcast has already converted all channels to digital even basic.

U get a channel numder and menu screen do show up?Not the tv,it the incomming broadcasting signal cable plug in or the cable box itself have problems.Tries unplug,replug the tv and the cable box back in like about an hour later.The tv will reset itself to the factory setting and the cable box should upgraded it softwares.Should work now.If have the same problems,tell the cable company change the cable box or check the incomming broadcasting cable wire with another tv,see the incomming broadcasting signal cable wire,with a new cable box,see if it work.

Can I assume that you have input signals going to both channels and that you have SWITCHED the cables to make sure that both cables going to the power amp are actually sending signals to it?
That will rule out any cable / pre-amp problems.
After you have done that test, let me know.

It sound like the tuner was bad. Replace main board will fix it.

using the magnovox remote, reprogram the vcr's channels. set it up to use cable not air. when the vcr was unlugged it lost it's channel memory. don't buy new cables, you're getting a picture and sound so that means your rca cables are ok.

Set up your infrared blasters connected from your IR port on the Tivo and by placing the two lead lights in front of your cable box so it (the cable box) can read the signal.  Then go to Channel settings accessed through Tivo Central and follow the questions. It will ask you to change channels until the remote is working correctly.  This all worked on a different "input" on my Mitsubishi TV (it has multiple inputs.  I have the cable input on a different "input" to make it work.  Hope this helps.  Call TIVO tech assistance because they are the ones who talked me through this.

auto search channels on menu. start at 1

I think the low band (Channel 2-6)in your tuner is not working. This could be in the tuner itself or in the band switching circuits. Possibly she deleted the low channels or locked them out. Stargazer