How To Troubleshoot Your Flashcart:
STEP 1: Make sure you're not using the card reader
that comes with the flashcart. Buy your own.
STEP 2: Check your
microSD card for smudges on the contacts. Clean with a QTIP. You can add a bit of alcohol onto the QTIP, if wanted.
STEP 3: Check your
Flashcart for any abrasions or smudges on the contacts. Clean with a QTIP. You can add a bit of alcohol onto the QTIP, if wanted.
STEP 4: Possibly, your Flashcart is not making perfect contact the DS. Try the "Paper Shim Trick" to close the gap and make the space tighter.
STEP 5: Copy all of your games and saves off your microsd card to your computer (BACKUP). Download the latest "Panasonic SD Formatter" and quick format with this application. Install the latest firmware again from a different/reliable site. Then add on your games and saves to the newly formatted card.
STEP 6: Try another DS.
STEP 7: Possibly the "GAMES" you have are faulty. You know what to do here...
STEP 8: If all else fails, get a new Flashcart and/or MicroSD Card.
Tell us what happens.