Hello all,

I'm stumped on this one, I have an old 4-stop hydraulic Dover unit with the solid state cards (power, door, car, top&bottom, and intermediate cards) with the potter&brumsfeld relays on it, and I am having an intermittent problem with a voltage drop on several of the call circuits, causing the halos on the buttons to slowly get brighter and brighter and eventually placing calls without anyone there. Upon arrival if i reset the car or jog the TOC inspection switch a few times the voltage climbs back up but only lasts a day or two before ghost calling again.

I'm ready to rip my hair out, anyone seen this before? Ive tried replacing the power card and intermediate card to no avail.