⚠
warning Brother
Error Code Drum - Yellow LED
Drum unit is nearing end of life.
? What Causes This
Drum unit has been used extensively and is approaching replacement point.
✓ How to Fix It
Prepare to replace the drum unit. See User's Guide Chapter 5 for replacement instructions.
Source: page 5 of the official manual
From the manual
This error code appears in:
Brother HL-2000 Monochrome Laser Printer