Brother HL-4040CDN - Manual (Page 155)

Troubleshooting
146
7
Waste Toner Soon The waste toner box is almost full. Be ready to replace the waste toner box.
(See Replacing the waste toner
box on page 117.)
Call service messages
Call service message Action
Print Unable ## Turn off the printer. Wait a few seconds, then turn it on again. If this does not clear the
problem, call your dealer or a Brother Customer Service.
Maintenance messages (continued)
Error message Meaning Action