Table 7-11. 8-bin Mailbox Error Messages (continued) 434 Chapter 7 Troubleshooting C4085-91087 Control Panel Message Event Log Error Message Description Recommended Action 66.12.zz or 66.22.zz OUTPUT DEVICE FAILURE 66.12.zz or 66.12.zz MBM C-link is not responding. 1. Check for proper installation of the C-link cables. 2. Replace the C-link cables. 3. Replace the 8-bin Mailbox controller PCA.