> For the complete documentation index, see [llms.txt](https://spaceandtech-engineerings.gitbook.io/space-and-tech-engineerings-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://spaceandtech-engineerings.gitbook.io/space-and-tech-engineerings-docs/radio/sate-elrs/troubleshooting.md).

# Troubleshooting

Receivers with RGB LED indicate their status as follows:

<table data-header-hidden><thead><tr><th valign="top"></th><th valign="top"></th></tr></thead><tbody><tr><td valign="top">LED Indication</td><td valign="top">Status</td></tr><tr><td valign="top">Rainbow fade effect</td><td valign="top">Starting Up</td></tr><tr><td valign="top">Green heartbeat</td><td valign="top">Web update mode enabled</td></tr><tr><td valign="top">Slow blink 500ms on/off</td><td valign="top">Waiting for connection from transmitter</td></tr><tr><td valign="top">Red flashing 100ms on/off</td><td valign="top">Radio chip not detected</td></tr><tr><td valign="top">Orange Double blink then pauses</td><td valign="top">Binding mode enabled</td></tr><tr><td valign="top">Orange Triple blink then pauses</td><td valign="top">Connected to transmitter but mismatched model-match configuration</td></tr><tr><td valign="top">Solid single color</td><td valign="top">Connected to a transmitter, color indicates packet rate</td></tr><tr><td valign="top">No Light</td><td valign="top">Off or in Bootloader Mode</td></tr></tbody></table>

&#x20;For detailed LED status indication animations, refer to the [Express LED Status page](https://www.expresslrs.org/quick-start/led-status/#receivertransmitter-led-status) in the documentation.

**Important:** When using the SATE ELRS V3 receiver, ensure that the SBUS connection from DJI (Air Units) is disconnected. Failure to do so may cause the receiver to enter boot mode unexpectedly. Always verify this connection before use to avoid any potential operational issues.


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