I repaired my 41C's flex circuit which was damaged by corrosion. In testing, I found something odd. With no other modules in place, the Math Pac worked in port 1 but not in port 2. The display would come on but then no response to any key, including power. The repair is on the port 1/3 side of the flex circuit, not the port 2/4 side.
However, with a 4X RAM in port 1, the Math Pac works in port 2. I read that the ROM has to come after the RAM, but why would the ROM not work without the RAM?
(Edited: they're ports, not slots. D'oh!)
Edited: 13 Mar 2010, 11:08 p.m. after one or more responses were posted