Hi TP,
The usual advice would be to find the make/model on the light.
However, marine rated LED anchor lights will burn 24/7 for tens of thousands of hours without ‘burning out.’
Therefore, I would assume the problem is not a ‘burned out’ LED on a 2017 model, but more likely a ‘connection’ somewhere between the helm switch and the LED sealed module.
Anyway, pretty simple to find out where the problem is. It is between the NAV/ANC light switch (which may include a ‘pop up’ circuit breaker under a clear plastic cover...make sure it’s pushed in) and the LED module. You will need a multimeter to check for 12V power at the switch, any ‘connections’, and at the LED module mount. Do your red/green NAV lights come on? The ‘all around/anchor’ light should be ‘on’ in either the NAV or ANC switch positions.
I like Fluke,
https://www.testequipmentdepot.com/fluk ... estsellers
...mainly because folks assume if you have one, you must know a lot more than you really do (Ha, ha!).
I searched and could not find a picture of your 2017 TC255. One listed for sale near Myrtle Beach, SC was a 2017, but with no pictures of a TC255. Did you buy that one? Is there a radar mount and ‘light bar’ leading up to the anchor light to be higher than a radar dome or other rooftop toys like dinghies or air conditioners?
In 2010 the factory was using Hella (I’ve replaced twice due to different radar mounts...I’ve never had a marine LED of any type fail unless due to ‘connections’).
In any event, you have no need to rush on this. You don’t even need that light unless you are cruising at night or anchoring out. (Try some luxe marinas early for the Ms). For B, you could sub a Davis Mega Lite cheaper than finding a replacement, and it also has many uses aboard over the next 20 years you (hopefully) are piloting your most excellent vessel.
https://www.anchorexpress.com/Davis-Meg ... 20%2429.99
Hope this is helpful. If this is the only issue on a new to you boat, you should be EXTREMELY grateful for your luck!
Order the Davis Mega Lite and drive down with it!
Cheers!
John