97
Brother Printer
Severity: CriticalWhat Does This Error Mean?
Brother error 97 means the printer's laser unit has malfunctioned. The laser unit writes the image onto the drum using a precisely controlled beam of light. This is a serious hardware error that prevents printing entirely.
Affected Models
- Brother HL-L5100DN
- Brother HL-L5200DW
- Brother MFC-L5700DW
- Brother MFC-L5900DW
- Brother MFC-L6700DW
Common Causes
- The laser scanner motor has failed or stalled, preventing the mirror from spinning at the correct speed
- The laser diode inside the unit has burned out due to age or a power surge
- The laser unit's mirror or lens is covered with toner dust, degrading the beam
- A loose cable connection between the laser unit and the main board has interrupted communication
- The laser unit is failing due to end-of-life wear after many thousands of pages
How to Fix It
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Turn off the printer and unplug it from power. Wait 10 minutes, then plug it back in and power it on.
A temporary motor stall can sometimes be cleared by a full power cycle. This is worth trying before assuming the worst.
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Check the cable connections to the laser unit. Open the printer's cover and look for any visibly disconnected ribbon cables connected to the laser scanner assembly.
Only attempt this if you are comfortable with electronics. Static discharge can damage sensitive components — touch grounded metal first.
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Gently clean the exterior vents of the printer with compressed air. Excessive toner dust inside the printer can accumulate on the laser mirror and degrade performance over time.
Do not spray compressed air directly into the laser unit — only clean the external vents.
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Check if the printer is under warranty. Visit support.brother.com and enter your serial number to check warranty status.
A laser unit failure within the warranty period is covered by Brother. Do not attempt further disassembly if the printer is under warranty.
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Contact Brother Support or a qualified printer technician. Laser unit replacement is an internal component repair that requires the correct replacement part and proper handling.
Brother service centers stock replacement laser units for supported models. Third-party repair shops can also source and install these parts.
When to Call a Professional
Error 97 is a hardware fault that almost always requires professional repair or laser unit replacement. Contact Brother Support at 1-877-276-8437 or an authorized service center. For printers still under warranty, this error is typically covered at no charge. Laser unit replacement outside warranty can cost $100 to $250 depending on the model.
Frequently Asked Questions
How does the laser unit work in a laser printer?
The laser unit contains a laser diode and a spinning mirror. The laser beam bounces off the mirror and scans rapidly across the drum, electrically charging specific areas. Toner sticks only to the charged areas, creating your printed image. The mirror spins thousands of times per minute — if its motor fails, you get error 97.
Can I continue printing with error 97?
No. Error 97 is a hard stop — the printer will not produce any output with a failed laser unit. Unlike some warning codes that let you continue, this error locks the printer completely. The laser unit must be repaired or replaced before printing can resume.
Is a Brother printer worth repairing when the laser unit fails?
It depends on the printer's age and replacement cost. For older basic models worth $100 to $150, repair costs may approach or exceed the printer's value. For high-capacity workgroup printers in the MFC-L5 and MFC-L6 series worth $300 to $600, a laser unit repair at $100 to $200 is often cost-effective. Get a repair estimate first and compare it to a comparable new printer's price.