Howdy,
Just picked up my "holy grail", a Bryan Kelly restored AFM. Bummer to find out I have (2) columns completely out on the lamp matrix. I double checked all the connections and they all look ok. I looked on pinwiki and it explains a test that requires a test socket/bulb and jumpering to specific pins and to look for the bulb to flash. I ran out of time at that point and had to go to work, so after work I want to test the transistors. Does this test procedure sound basically correct? Would most make an educated guess that the associated transistors have gone bad for these 2 columns?