My wife bought me a 37 inch Proscan from Sears 7 years ago. Still running strong!
"In 2006, Thomson Consumer Electronics licensed the Proscan name to ON Corporation, although they retain ownership of the name and logotype. On Corporation sold ProScan to Curtis International Ltd. in 2011. ProScan is now owned by Curtis International Ltd.."
Your set may have been the previous manufacturer - so there could be major quality differences. It looks like Curtis/ProScan/Sylvania/RCA are manufactured by the same company at the moment. I thought it was TCL but, not sure who "ON Corporation" is.