# Pixhawk 5X (Telemetry 1 not working after update)

**URL:** <https://discuss.px4.io/t/pixhawk-5x-telemetry-1-not-working-after-update/26027>\
**Category:** PX4 Autopilot\
**Created:** [February 3, 2022, 5:48am UTC](https://discuss.px4.io/t/pixhawk-5x-telemetry-1-not-working-after-update/26027 "2022-02-03T05:48:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mcMega](https://discuss.px4.io/user_avatar/discuss.px4.io/mcmega/32/10050_2.png) [@mcMega](https://discuss.px4.io/u/mcMega)\
**Post date:** [February 3, 2022, 5:48am UTC](https://discuss.px4.io/t/pixhawk-5x-telemetry-1-not-working-after-update/26027/1 "2022-02-03T05:48:39Z")

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Hello everyone!  
After updating the firmware via QGroundControl, the Telemetry 1 port stopped working. I connected radio telemetry to it.  
Now it works only on port 2.  
Firmware - PX4 Autopilot 1.12.3  
MavLink writes “No connection” and packets are not accepted.  
The green LED on the telemetry itself is on, there is a connection between the radio modules. From the side of the computer, the red LED blinks periodically - data is being sent.  
Resetting settings doesn’t help.  
Tried different speeds but it didn’t work.

What could be the problem?