Good info, thanks for sharing. I have one question related to your comment about independent parts suppliers carrying boards in addition to the manufacturer's supply. I got my F5300 from Sears and purchased an extended warranty through them. Let's say a few years from now my set needs to be repaired (non-panel or driver board issue) and neither Sears nor Samsung have the board in question left in their supply. Would they check with these independent part suppliers or would they just determine the set cannot be repaired?It's true that there are no more 2013 TV sets in their distribution chain, but various boards and other parts are still available from Panasonic's consumer and pro parts departments (including various new and factory-refurbished boards) but like every year for the past 15 years, this inventory eventually gets depleted. Panasonic's parts department is still open for business. And if new or refurbished boards are no longer available from Panasonic, there are a number of independent parts suppliers that not only have new or used or refurbished boards available, some also have a service where you (or the service center you're dealing with) can send your boards in to be diagnosed and repaired then shipped back to you. Sadly, more and more service centers are not interested in or capable of doing their own in-house board diagnosis or repair, and some are even incapable and/or unwilling to diagnose the actual TV to see which board has failed - choosing instead to just ham-fist it and replace boards until the TV starts working again.
As for the plasma panel portion, some years back when the prices of the TVs were high (like $2000-$4000) they did have spare panel modules available after end of production as it was still economical to replace a $1,000 panel under warranty, but starting about 4 years ago when the price of the TVs had become much lower it became more economical to simply replace the TV as opposed to providing an expensive panel then also incurring the high cost to ship that panel to the service center then also pay the labor costs to replace said panel, so they stopped stockpiling spare panels and instead withheld some new TVs in stock for factory warranty replacement.
Samsung actually was more likely to replace the whole TV under warranty than Panasonic was since Panasonic TVs have more replaceable boards while Samsung saves cost by building their boards into the panel module itself, so if a driver board goes bad, they would have had to replace the whole panel since the board is not removable. Panasonic panel modules have less on-board electronics than the Samsungs do.