SparkyGuy wrote:
50-inch Samsung model HLN507W had it's bulb replaced by a service tech from
the local shop. Replacement lasted a 1 day.

Anyone have experience with this model? What should I suspect is causing
bulbs to burn out? A common problem?

Are there troubleshooting or service docs available on-line?

Thanks,
Sparky

Maybe a problem with the ballast or something to do with the
airflow/cooling.
Call the tech and have him fix the cause as well as a new bulb.
The bulb should be under warranty but expect to pay more if there is an
additional problem.