I was going to take one or two relatively small LED flat screen televisions in the 22" to 32" inch size. It would fit in baggage. But would Thai customs try to either confiscate them or make me pay duty on them? Anyone brought TV's or computer equipment through the airport? Did they let it slide? Thanks.

i brought two laptops and nothing was said ,if i were you ,id be more worried about this :

In 2 dozen trips into Thailand I've yet to have any bag opened by customs, and I've brought various electronics with me most trips.

Just in case, bring receipts showing a low value, worst case they hit you for a percent of that.