By not working, I mean that the MK3 menus don't boot. I've tried the latest versions of the MK2_MK3 menu as well as Moonshell. When I boot the DS, it gives me the normal DS boot screen, not the menues. i've tried using Neo Max 1.7 and Noew Power Kit 2.3. They both work to load GBA ROMs but I can't get the MK3 menus to load. I've checked all connections of the Flash Card, SD card, retail DS card and the MK3. Still nothing.
I'm not sure what "Newmax 1.9A4" is. Can you include the link? Yes, I can load any GBA ROM on my flashcard and it works fine (saving games is another story - and thread) but they work. So I then tried flashing DS ROMs directly to my flashcard and those don't work (the homebrew I tried from Dr. NEO's previous FAQ was "GridChallenge.ds.gba". This is telling me that there's something wrong with the MK3. I guess I can try cleaning the leads but it's brand new. The couple times I got the menus to work, I just tried flashing a game to the flash card and it errored out stating not enough space. I couldn't get it working since. Is there any way to format the MK3 without booting it up? I also got moonshell to work twice but not since. I didn't even get an opportunity to load anything.
Lastly, I've tried contacting Linker4U and I've received no response about returning it. Does NewFlash provide a replacement program for warranty items?