Cable is input to Antenna 1 slot.... cable does not work works fine when input through a cable box. Will the TV not process cable without a box?

Are you saying neither the antenna/cable or HDMI inputs work?

If you're using a cable box, you need to set the TV to Channel 3 or 4 and set it to cable input. The cable box does all the tuning.
If you set it to antenna, you must have some kind of antenna attached to get any channels.
With some cable services, you can connect directly to the cable bypassing the box, but most no longer work that way.

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.

If you have a cable box and your cable is attached with coax to the antenna or cable input you're probably receiving everything on Ch 3 or 4. If you don't have a cable box, then make sure the input / source is set to cable and not antenna.

If other inputs show no problems and you are not using a cable box or satellite receiver, etc. just off air antenna, something on the main board is failing. please double check other inputs again.

You should be able to connect the TV to the antenna without the tuner converter box. If you still do not get signal you may need some type of signal amplifier between the antenna and TV. Hope that helps.

Hello
First of all reset the TV. for that

press and hold the POWER button
on the TV control panel for 5 or more seconds to reset the TV.
Then connect the TV tt any source like outdoor areiel or cable box etc, select the appropriate input, and retune the TV. First of all, connect it to an external antenna, and set it to autotune.

• You must configure the ANT/CABLE input source before

programming channels (-left-hand column).

• If the ANT/CABLE input signal type is set to Cable, the

automatic channel programming process erases channels

that were previously programmed into the TV's memory.

• If the ANT/CABLE input signal type is set to Antenna, the

automatic channel programming process adds newly found

channels to the existing set of programmed channels (and

does NOT erase channels that were previously

programmed into the TV's memory.) To remove an Antenna

source channel from the memory, you must manually delete

it.

• To tune the TV to a channel not programmed in the channel

memory, you must use the Channel Number buttons on the

remote control.

• Programming channels when the ANT/CABLE input is

configured for Cable will take substantially longer than when

the antenna input is configured for Antenna. This is normal;

however, once channel programming is finished, you should

not have to repeat the programming process again unless
your Cable TV service lineup changes significantly.
Find out the received channels are clear or not. If they are clear, your TV is perfect, and the input device you connects ot the TV is faulty. OK.

did you switch the TV's incoming signal to digital antenna? For the cable box it was probably set to cable antenna or analog inputs, not all TV's have automatic switching for antenna feeds. My Mitsubishi has 1 digital and 1 analog antenna input and the cable box will only work through the antenna input if it's the analog antenna input and it's tuned to channel 3 or 4, -(or through a seprate HDMI, PROSCAN, SVCR,or a yellow RCA plug input)- and when the analog antenna input is selected the TV will tune all analog cable channels that the cable service offers if a box is not used. likewise the TV will not tune any channels at all if it's set to digital antenna inputs. It will tune all local channels only when set to digital antenna inputs.

Try an antenna directly on the tv to see if you get any stations. This will assure you that the tuner is working. Then hook up the new box and tune tv to channel 3 and turn box on. You should get some kind of display. If no luck you could hook audio/video cables from the audio/video output on the box to the video 1 input on the rear of your set. Then switch tv input to video 1 and turn box and tv on. This too, should give you something on the screen. Make sure the antenna is hooked up to the "ant. in" on the box. This should help, Russmann.

1) Connect the coax cable from the antenna to the converter box input.
2) Connect the coax cable output of converter box to the input of the VCR.

This is the only way it will work but you will have many limitations such as using the programming features of your VCR.

The boxes are fine if you want to play prerecorded DVDs or tapes. If you want to record tapes you have to leave the box on and have it set to the station you want to record.