All of my lights on column 3 on my Sorcerer are acting up; during gameplay, the lights stay on, and during attract mode, they flicker but never go completely out. Weirder still, when you turn the game off, they all briefly light up and then slowly fade out. Does anyone know where I should start looking? Thanks in advance!

We replaced the diode on every one of the affected lamps and the problem still persists. We're going to try and replace one of the transistors; anyone know which one to replace? The manual doesn't specify.