A friend of mine just got a Metallica pro, his first pin and one of the lamp columns is stuck on.
Lamp Column #8
My initial thought was a transistor, but it seems like they are only on the rows. I read in another thread about Diode on terminal switches (DOTS) terminals, but don’t know how they play into this mix. I don’t want to shotgun replace the IC unless I’m fairly certain that’s the issue. Any thoughts would be appreciated.