The screen is not working correctly

Make sure to cut the trace on the shield next to CLK and run a wire over to A4. For more information, see Connecting Using RGB Matrix Shield and scroll down to the Metro M4 Usage section.

There is still a bunch of random pixels on the screen and it's unreadable

Try connecting power only or try a different ribbon cable.

The display keeps fading out or resetting.

Make sure you have enough external power going to the Metro M4 Express Airlift. The RGB Matrix requires a lot of power.

This guide was first published on Aug 21, 2019. It was last updated on Jun 10, 2024.

This page (Troubleshooting) was last updated on Mar 08, 2024.

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