Wow, you have a MGD2. Very interested.
Can you list every component included with the MGD2?
Like how many dram/sram cards are included and which I/O devices do have? Also, is the PC link adaptor included?
I don't see it in the picture you provided.
IIRC, to play Neo Geo games you need like 4x 32MB DRAM cards and 1x 8MB SRAM card plus the Neo Geo I/O adapter. Do you have a Neo Geo I/O adapter included? It should look like a giant black cartridge.