If the panel keeps showing "connecting," and does not respond at all. Please turn off the machine and reflash the SD card.
1. Remove the screw and open the right cover.
2. Find the micro SD card on the mainboard.
3. Download the ISO from the following link.
https://drive.google.com/file/d/1tRenUOKVbYrnugTfSiQ1p4cJbx09Eter/view
4. Flash the ISO file to the SD card with burning software.
Windows https://etcher.io
macOS https://www.balena.io/etcher/
5. After reflashing the SD card, upgrade the firmware to the latest version.
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