Hi, the cost effective, most durable replacement is a new board. Usually it is the relay on the board that goes out (parts for boards are not available). If you don't hear a click when powering it from the hose then this is the problem. This replacement is top quality, made by the lead supplier of boards for vacuums. https://builtinvacuum.com/retail/shopretail.php?part_no=236L
. The cost is under $60, plus shipping. The board may need a new connection to the can, made with a drill. Thank you for asking.