This is a 7 year old thread and people still can't agree on how to bring in a TV. LOL
lol, true, everyones experience will be different.
I avoid Puerto Plata, I love Santiago. Friendlier staff, more flight options, better prices.
In Santiago my luggage is scanned 95% of the time, and I have observed thats normal routine when travelling with a cartfull of luggage. I always bring two large suitcases, a wheeled carry-on and my backpack.
I use a luggage cart and have a porter help me put it in the scanner and have them wheel it out. I do this NOT because the porters actually have any clout but because it speeds up the process and keeps everything flowing. I blend in
Once I have handed in my customs form, I never look at any of the other staff, I just walk just a little ahead of the porter and and casually wait for luggage to be put back on my cart by him.
I have brought in many microwaves, 28-32 inch TV's etc . Never a problem.
I have only had suitcase opened a handful of time and each time, I understood why.
Once I had 4 bags of organic apples in my suitcase , I took one out of the bag for the road and gave up the rest
Another time, two 32 unit watch cases that showed up as peculiar on the scanner.
This is my experience after over 400 flights through 11 years to DR .
They are more interested in wanting to clear your flight so the lines don't stack up and the big jefe then wants to know whats happening.
Enjoy your flight with your TV and stop worrying. They are looking for real contraband , not TV's.