Tony, It was good seeing all you guys at Oshkosh. The LEFT strobe light on our 340A (340A0973) quit working. The LEFT tube works on the RIGHT hand strobe so it appears there is a problem with the power supply or power to the LEFT unit. Do you know anyone that works on these units. Cessna sells overhauled units for from about $600-$900 with the core value of from about $6000-$9000 depending upon part number. I am hoping there is a way I can repair the unit in our 340. Do you have any trouble shooting suggestions beyond verifying power to the power supply? Thanks for all you guy’s help in keeping our twins flying.