This is the kind of TV I have; can I plug headphones into it? I looked at the television but there are so many little plug holes that I don't know what they're all for.
I explained that Sony makes lots of different models, some with and some without headphone jacks. We really needed the actual model number of his television to answer this, so he said he'd go home and look for that and call me when he found it.
20 minutes later he calls, and I do an image search for sony kdl32l5000 to look at the pictures. My logic was that a headphone jack would probably be right on the front of the television if anywhere, so it should be easy to spot. If that didn't work, then I'd look for specs or a manual.
I found lots of pictures of the front, back, and sides of the television, but didn't see a headphone jack anywhere. None of the reviews mentioned headphones either. To double-check, I visited the Sony's product webpage for this television. I did Ctrl+F to search for headphone on the page, but there was no mention - and disappointing product images, too.
All the while, the patron had been describing the jacks he could find - none of which had a picture of little headphones next to it.
For a quick last attempt, I did another search for kdl32l5000 headphones and found the manual, and also the chat log of someone offering support for this exact question. I found the chat log hilarious, but between that and everything else I'd found, the conclusion was that there is no headphone jack on this television.
The patron was fine with that when I told him. However, in the meantime he had inadvertently pulled all the other wires out of the television while sliding it around, so the headphones were now the least of his worries.