For me it's more about a and an, if someone were to write: "I installed a HDMI cable" my inner monologue will actually yell as it passes over the "a" to heavily emphasize the mistake.
Depending on how annoyed it is, it might even respond... "Really? Did you really install _A_ HDMI cable today? Really? Maybe you installed _AN_ HDMI cable?"
Acronyms are generally the worst for a/an situations as depending on if you personally pronounce the acronym as a whole word or spell it out in letters the rule might change.
I have experiences like those of the previous poster, but I also experience when listening to speech, so it's not specifically visual, at least for me. And no, I don't experience speech visually (unless I'm reading a text transcript).
And as a visually-oriented person you would also be less likely to have an inner monologue.