"Fatal Printer Error" message on the SendPro CX Series

Reseating the printhead and ink cartridge can often resolve a Fatal Printer error.

Products affected: SendPro® CX 100, SendPro® CX 200, SendPro® CX 300 and SendPro® CX 500

Issue

The message "Fatal Printer Error" appears and the device will not run mail.

Cause

The ink cartridge or printhead may not be in the correct position or there may be an internal malfunction.

Resolution

You may be able to clear this error by re-seating the ink cartridge and printhead:

  1. Tap Settings.
    Settings (gear) icon
  2. Tap Ink & Maintenance in the Mail Settings section.
  3. Tap Install Printhead .
  4. Open the top cover.
    Open or close the top cover
  5. Slide the green lever to the right and then flip the ink cartridge cover open.
    Push green lever openInk cartridge cover open
  6. Remove the ink cartridge.
    Ink cartridge being removed
  7. Squeeze the tabs on either side of the printhead.
    Printhead removal
  8. While squeezing, lift and tilt to the printhead to the right. The printhead should come up out of the device.
    Printhead withdrawal
    1. Grooves.
    2. Peg.
    3. Tab.
  9. Re-install the printhead and ink cartridge.
  10. Close the top cover.
  11. Tap Done.

If the error persists, restart the device:

  1. Unplug the power cord. The screen turns off after 10 seconds.
  2. Wait 30 seconds.
  3. Plug the power cord directly back into a wall outlet. Check that the wall outlet is working correctly.
  4. Quickly tap and release the power button to turn the device back on.

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UPDATED: October 06, 2026