Trouble Pairing Cortex to Transmitter

Pairing problem.
Using the latest firmware.
Downloaded firmware via RobotC, and also with the Firmware Upgrade Utility.
Using 2.0 keys; keys are ok as I can pair other cortex-transmitter pair using these two keys.

Cortex: Game - fast green blink, Vexnet - off, Robot - slow green blink
Transmitter: Robot - slow green blink, Vexnet - green on, Joystick - red when power off, green when power on

Not sure what else to try.


Based on the light sequence it sounds like the firmware on your Cortex is corrupted.
Please use the VEXnet Upgrade Utility to reload new firmware into the Cortex:

If the problem persists, please contact [email protected]