I found a 24" Haier LED TV with built-in DVD
player that uses an external "brick" power supply. Also bought a Carnetix 12V-12V DC-DC converter (intended for car-PCs) to give it and a few other things clean power, but have been running the TV directly on ship's power without difficulty. Then again it's seldom on while motoring and never during a charger
It was larger and less than half the price
of "purpose-built" 12V TVs, has both analog and digital tuners, can even time-shift record
digital TV to a USB stick (not that I ever have) and display photo
slideshows from USB (hangs on certain photos).
Mainly I wanted the largest 12V DVD/TV screen
that would fit the available space, and built-in DVD
is a convenience for the rest of the family
. I can play DVDs on my laptop
(which can also play Blu-Ray, in which case the PC can feed the larger screen), or for kicks run the Raymarine
E120 video out to the "big screen" for guests.
Have to watch the model number carefully, the first one I bought turned out to be LCD, not LED (meaning LCD with fluorescent backlight) with only direct 120VAC input and an internal 19V power supply for the backlight (yes I took it apart to check if it was worth converting). However after that TV was stolen I was able to replace it with the LED/LCD version which uses the 12V "brick" power supply.
... and I just received another $7.52 cheque via the probation deptartment from the individuals responsible for taking the first TV (and leaving a credit card receipt, complete with cardholder name, in the cockpit). This has been going on for two years so far...