Dumb question... I’m having an issue with Checkpoint blowing the F2 fuse on startup. Apparently the issue is related to the pop bumpers... I tested a pop bumper diode in circuit and it read bad, but when I pulled it out of circuit it read good. I checked the coils and they were all good, but the one with the bad diode was only reading 3 ohms instead of 4 ohms. Any ideas what would cause this?