@Mariah135
Agreed that if the TV amenities are clearly listed, there is absolutely no need to refund for that. I really encourage guests to read the listing before booking, but if they ask for something/complain about something that is there, I find it useful to respond - but in a friendly tone - "Oh yes, as I mentioned on the listing, I don't have cable. However, I do have X, Y, Z."
RE the washing machine, I think you did all you can and it doesn't really warrant any refund if the guests were not disrupted by the repairman's visit.
Did the guests ask for a refund? Are they complaining? If not, I wouldn't offer them any. You might then put into their heads that it's more of a big deal than it is. The only unsolicited refunds I have given are for extra fees, e.g. I refunded some guests for storing their luggage, or even for an extra person fee, as a nice gesture because they were lovely guests. If you want to offer a small refund as a goodwill gesture, by all means go ahead, but I would decide based on whether you think these guests would really appreciate it or not.