Action Replay Plus PCB
The newest pcb revision of the ARP cartridge no longer allows placement of the communication connector.
See the picture above. The newer board, which is not able to be modified, is shown on the left. The board has been reduced in size, and there is no longer space to add the connector. Also the area for placing U4 is no longer available.
Please check your cartridge before sending it to me for modification. It needs to look like the board on the right (with a spot for the connector, and a spot for U4). All you need to do is remove 2 phillips screws, to take the plastic case off. You may then see which circuit board version that you have.