The BUZZ has landed!!! Sent you a PM Bo - Bless your heart!
Mage, it sounds like the PCB has probably gone bad in it. Unfortunately, we no longer have the PCBs for the original Buzzes and the Buzz Pro PCBs won't fit the old tubes I wish I had better news for you.
Wow....I feel like I should have a funeral. The Buzz has always been my "Old Reliable". When people would ask me which device to get, I would tell them "It doesn't have many frills, but when it absolutely, positively has to fire every time you hit the button, go with the Buzz".
Now, after years of service, it is time for it to go gentle into that good night.
Rest in peace, my friend. You've earned it.