Description SONY KDL-50R450A LED TV 4-473-640-01 BASE STAND KDL-50R450A 4-473-640-01 BASE STAND. Purchase Power Supply boards for TV repairs at your #1 source for quality replacement parts – Patch1Stripe.com. We offer fast shipping in two to three business days. Please, browse our selection of Cables, Mainboards, TV Stands, and LED Strips. We have helpful videos on troubleshooting tips to find that faulty part so that you can order the right parts the first time. Visit our YouTube channel @ Patch1Stripe. Here are two of our best troubleshooting videos – https://youtu.be/-qTBB4hYdZU  and https://youtu.be/Fe3-vxhPTsE. TV breakdowns happen from power surges or failures from normal usage. Sometimes there are multiple defective parts in a broken TV. Replacing all of them at the same time is critical. There is a probability that the replaced part can sustain damage resulting from not replacing all defective parts together. Sorry, but that is on you! Or the DIYer or servicer that purchased the incorrect replacement part and it doesn’t fix their TV. Sorry, but that is on you as well! What is on us is to be the supplier of defect-free electronics parts for customers. Accepting returned electronics parts back into our inventory exposes customers to the risk of receiving contaminated/defective parts. And we won’t let that happen. No returns on electronic replacement parts.