Hardware test problem.

Normally when I hit the TEST button or power on with DIP 1 ON, I can run through a hardware test for the controls and credit buttons. For some reason when I do that now, I get a cross hatch and I can only soft reset with B, or view memory banks with D.
I recently moved the 4-slot from a Candy to a US MVS both wired for stereo, did I forget to change something? Also I am using UNI 2.2 in EURO ARCADE mode.

Make sure that the PCB's on the motherboard are firmly pressed together.