Brother HL-L2350DW black lines or toner stains down the page
Cause 1 of 3The corona wire is dirty, or the green tab is not in the Home position. Source: Troubleshooting: Improve the Print Quality, pp. 172-173
First checkClean the corona wire inside the drum unit by sliding the green tab.
Causes and checks
The corona wire is dirty, or the green tab is not in the Home position. Source: Troubleshooting: Improve the Print Quality, pp. 172-173
- Clean the corona wire inside the drum unit by sliding the green tab. See Clean the corona wire.
- Check that the green tab on the drum unit is in the Home position.
The toner cartridge or drum unit may be damaged. Source: Troubleshooting: Improve the Print Quality, pp. 172-173
- Put in a new toner cartridge. See Replace the toner cartridge.
- Put in a new drum unit. See Replace the drum unit.
The fuser unit may be contaminated. Source: Troubleshooting: Improve the Print Quality, p. 173
Brother Solutions Center Contact Brother customer service. Contact: support.brother.com.
All 3 causes checked. Contact Brother Solutions Center.
Service
If the checks above do not clear it, contact Brother Solutions Center, support.brother.com. Europe: contact details of the local Brother office are at global.brother/gw. Source: Appendix: Brother Numbers, p. 244
Other HL-L2350DW problems
- Printer does not print anything4 causes in the manual. First: the machine is in Power Off mode.
- Printer stopped printing or does not print the jobThe job is incomplete or stuck in the machine's memory.
- Headers or footers show on screen but do not printThe top and bottom of the page are an unprintable area.
- Printer prints garbage or unexpected text2 causes in the manual. First: an incomplete or stuck job is in the machine.
- First pages print correctly, then pages are missing text2 causes in the manual. First: the application is not set up for the machine.
- Printer does not print on both sides of the paperThe paper size or weight set in the printer driver does not allow automatic 2-sided printing.
- Print speed is too slow2 causes in the manual. First: the print resolution is high.
- Printer does not feed paper4 causes in the manual. First: the paper in the tray is curled or crooked.
- Printer does not feed paper from the manual feed slot3 causes in the manual. First: the sheet is not pressed far enough into the slot.
- Printer does not feed envelopesEnvelopes are not fed one at a time, or the application uses another size.
- Faint or light print5 causes in the manual. First: the toner cartridge is at the end of its life.
- Grey background on printed pages2 causes in the manual. First: high temperatures and high humidity add background shading.
- Ghosting images on the page5 causes in the manual. First: low humidity and low temperatures cause ghosting.
- Toner specks on the page5 causes in the manual. First: the media type setting in the printer driver does not match the paper.
- Hollow print with white holes in black areas3 causes in the manual. First: the paper is thick for the media setting in use.
- Page prints all black2 causes in the manual. First: the corona wire in the drum unit is dirty.
- White lines across the page3 causes in the manual. First: the media type setting does not match the paper.
- Lines across the pageThe drum unit is dirty or damaged.
- White lines, bands or ribbing across the page3 causes in the manual. First: high humidity and high temperatures cause this fault.
- White or black spots at 94 mm intervals2 causes in the manual. First: the drum unit has foreign material, such as glue from a label, stuck on it.
- Black toner marks across the page3 causes in the manual. First: glue from laser-printer label sheets stuck to the drum surface.
- White lines down the page2 causes in the manual. First: foreign material such as a torn piece of paper, sticky notes or dust is in the machine or around the toner cartridge and drum unit.
- Printed image is skewed3 causes in the manual. First: the paper is loaded incorrectly or the guides do not fit the stack.
- Curled or wavy pages3 causes in the manual. First: high temperatures and high humidity curl the paper.
- Wrinkles or creases on the pageThe paper is loaded incorrectly or is the wrong type.
- Toner rubs off the page (poor fixing)2 causes in the manual. First: the two green levers inside the back cover are not up.
- Envelopes print creased2 causes in the manual. First: the green levers inside the back cover are up while printing envelopes.
- Cannot complete wireless (Wi-Fi) setup3 causes in the manual. First: the security settings (SSID or Network Key) are not correct.
- Cannot complete Wi-Fi Direct setup6 causes in the manual. First: the SSID or password is not correct.
- Cannot print over the network5 causes in the manual. First: security software blocks the machine's access to the network.
- Check that the network devices are working4 causes in the manual. First: the machine, access point, router or hub is off or not set up.
- WiFi light blinksThe wireless connection is down, or the machine is trying to connect to an access point.
- Printer is not in the AirPrint printer listThe machine is off, the network settings are wrong or the mobile device is too far away.
- Cannot print with AirPrintThe machine is off or the network settings are wrong.
- iPhone or iPad prints only the first page of a documentThe iOS version is out of date.
- Printer will not turn onA power surge or lightning triggered the machine's internal safety mechanisms.
- Brother software cannot be installed2 causes in the manual. First: security software blocks the installation program on Windows.
Sources
- Online User's Guide, HL-L2310D / HL-L2350DW / HL-L2357DW / HL-L2370DN / HL-L2375DW (UK English). Brother Industries, Ltd. Document cv_hll2310d_uke_oug_c, revision c (PDF created 2021-01-31), 249 pages, en-GB. download.brother.com (PDF). Listed on the manufacturer's support page. Retrieved 13 November 2026.
Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.