Nothing is displayed

• Make sure the sketch uploads successfully to the Teensy 3
• Check the soldering on the SmartMatrix Shield

"No SD card" message

• Make sure the microSD card is inserted in the reader, and is formatted properly
• Check your soldering on the Teensy headers, (plus expansion connector and SD card adapter if you used a Teensy 3.2)
  • Check the wires, make sure none are loose or connected to the wrong pins
• Try another microSD card

"No gifs directory" message

• Make sure there is a directory called "gifs" in the root of the microSD card
• Make sure the card is formatted properly

"Empty gifs directory" message

• Make sure all files are named in 8.3 format, and are placed in the /gifs/directory on the microSD card

Other GIFs are playing, but my custom gif isn't playing

• Check the name, make sure it is in 8.3 format
• Try removing all other .gif files from the /gifs/ directory, leaving just the GIF you want to test
• Make sure the size is exactly 32x32 pixels (or the size you set for your display)
• Make sure the file plays on a computer. You can open the GIF with a web browser if you don't have any other programs to play it back.
• If your file plays on the computer but not on the display, please let us know by opening an Issue on GitHub with your GIF attached so we can troubleshoot.