Error 3F3D on the SendPro CX Series
If you see error 3F3D, reboot your device.
Products affected: SendPro® CX 100, SendPro® CX 200, SendPro® CX 300 and SendPro® CX 500
Issue
Error 3F3D appears on the device.
Cause
An internal error caused this message.
Resolution
Restart your device.
- Unplug the power cord. The screen turns off after 10 seconds.
- Wait 30 seconds.
- Plug the power cord directly back into a wall outlet. Check that the wall outlet is working correctly.
- Quickly tap and release the power button to turn the device back on.
UPDATED: October 06, 2026