I mounted it in a prepped cartridge case and put in a 2GB card then inserted it in my Retron-3 (original not revision). I turned the power on and all I got was a black screen. Tried formatting the SD card on my desktop then putting it in the machine and still no luck. I tried a second 2GB SD card and still nada. The first card was a Dane and the 2nd a Kingston micro in a SD adapter.
I saw the formatting tip on this forum but, as I mentioned, that didn't work. I didn't really see any other posts that looked relevant.
Anyone know how to fix the problem? I'm stumped.