I hardly ever notice my profile comments so in the future I would recommend posting in the forums. Those are easier for me to follow and track. At on time I think we ran a smaller TV and when that TV became obsolete from the supplier they upgraded to a larger one. Having said that, there should be model numbers and owners manuals somewhere in the unit. That might list what the serial number of the tv was...you can track it that way. Otherwise send a message to mjankowski@forestriverinc. com and see if they can look on the traveler to find the serial number. The traveler is the QC paperwork that runs down the line with each unit.