I can't seem to figure out how to get my sound bar hooked up to my tv without using an aux cable

PCM mode is a digital audio file that should be sent to the soundbar via an optical or coaxial digital audio cable. The coaxial digital audio cable uses an RCA plug but not the L/R stereo channels of analog audio. The aux input is usually the 3.5 MM cable from a computer, CD or MP3 player or a cell phone or tablet.

First, which type of RCA cable is connected between the sound bar and the TV? Second, are you sure that the TV connection is an audio out? (A number of recent TVs have only one audio output. This means there is only the optical audio out and not even a headphone jack.)

Once you double-check the input at the sound bar, choose the Line In input if you are using the stereo RCA cable. If you are using the Optical input, select that input. Use either the Mode button or the specific input button on the remote. Then double-check that the TV is set for the appropriate audio out.

I hope this helps. Please add a comment with the model of the TV and the sound bar for further information. I looked at the ONB18SB001 documentation for some of this. The manual for this Onn soundbar is available at Manuals Lib. See https://www.manualslib.com/manual/1498038/Onn-Onb18sb001.html?page=12#manual for the list of input modes and the input to which they correspond. Here is the image of the inputs on the back of the ONB18SB001: https://www.manualslib.com/manual/1498038/Onn-Onb18sb001.html?page=7#manual .

Cindy Wells

what brand/model of soundbar and tv?

i had same problem and had to run a cable from the headphone jack on my tv to the sound bar

Hook your sound bar to your output device, Cable Box, DVD/Blu-Ray player. Or try the follow should your Sound Bar have HDMI.

Output Device>Sound Bar>TV
The Sound bar should have a HDMI in and out or at least most Samsung models do as well as Bluetooth support.

It is easier to answer when you list the model of each Item, there are many different version of Samsung sound bars.

replace optical cable or re install toslink cable

The TIVO system is not a problem. I have it and it works fine. Make sure all the cords are plugged and screwed in tight.

I don't see any audio outputs on this television. Without them it is not possible to connect a sound bar. However I am currently using a sound bar with a television with no audio outputs. I am connecting my devices to the television with the video cables only and connecting the audio cables directly from them to the sound bar. I am pleased with how doing this turned out.

First, recheck your cables, and their configuration. Make sure whatever source you're using is properly connected to the television. If possible, check your peripheral devices by hooking them up to another TV.
If you're just connected to cable, and if you've already fiddled with all of the on screen menu settings for audio without any luck, then it's possible the TV has some mechanical defect requiring professional repair, and you should not attempt this yourself.
In the meantime, you can try hooking up a stereo to the TV's audio output jacks (use a pair red and white cables to connect the audio out jack on the TV to the auxiliary jack of a stereo). Turn both of them on, set the stereo to aux, and see if you get sound.

The only way you can do this is by connecting the Cable Set Top box HDMI directly to the TV HDMI input and switching the TXSR508 to Apple TV. And if you want to hear the Cable sound through the TXSR, connect analogue audio out of the TV to one of the analogue inputs of the TXSR ( Aux or Video In ). You may not get the Cable TV's Dolby 5.1 sound but you will get stereo sound which on using the TXSR's dsp setting ( ProLogic II ) can be made into 5.1.