Question 1

duplex unit is jamming every time it tries to flip the page for two-sided printing

Accepted Answer

DIAGNOSIS The duplexer (the internal mechanism that flips the paper) has guide plates or rollers that are either worn or have a buildup of paper dust and toner, causing the paper to skew and jam on the turn. FIX Power off and unplug. Open the rear cover of the printer. You'll see the green plastic duplex paper path. Inspect it for any obvious obstructions or torn pieces of paper. Use a can of compressed air to blow out any dust from the entire path. Then, take a slightly damp cloth and wipe the green guide plates to remove any residue that might be causing friction. IF THAT DIDN'T WORK Try printing on a different paper type or weight. The duplex unit on this model can be finicky with lighter-weight or non-standard paper. Switch to a fresh ream of standard 20lb or 24lb paper and see if the jams stop. HEADS UP Avoid using paper that's been through the printer once already (like a misprint you're re-using). The heat from the fuser can slightly warp the paper, making it much more likely to jam in the tighter turns of the duplex unit.

Question 2

prints are coming out with faint vertical lines or streaks down the page, new toner cartridge

Accepted Answer

DIAGNOSIS Streaks with a new cartridge usually mean the transfer roller or the fuser unit is dirty or worn. Toner is sticking to a dirty surface inside the printer and getting smeared onto the page. FIX First, run the printer's internal cleaning cycle. On the control panel, press the 'Settings' button (the wrench icon). Navigate to 'Maintenance' and then select 'Clean Drum'. The printer will run for a minute or two. Print a test page (like the printer configuration page from the network menu) to see if the streaks are gone. IF THAT DIDN'T WORK The issue is likely the transfer roller, which is a long rubber roller you can access by opening the front cover and looking beneath where the toner cartridge sits. Power off and unplug the printer. Use a dry, lint-free cloth to gently wipe the entire length of the black transfer roller to remove any built-up toner dust. HEADS UP If the streaks are repeating at precise intervals (like every 2 inches), it's a defect on the drum of the toner cartridge itself. Even new cartridges can be faulty. If cleaning doesn't work, you might need to exchange the TN-660 cartridge.

Question 3

wireless keeps dropping, have to keep re-adding it to my network every few days

Accepted Answer

DIAGNOSIS This is usually a conflict with your router's DHCP lease time or an IP address conflict. The printer gets a temporary IP from your router, loses it, and can't find its way back onto the network. FIX Log into your router's admin page. Find the list of connected DHCP clients (often called 'Attached Devices' or 'DHCP Reservations'). Locate your Brother printer and assign it a static IP address or a DHCP reservation. This ties the printer's MAC address to a specific IP on your network so it never changes. You'll need to re-configure the printer's wireless connection once with this new fixed IP info. IF THAT DIDN'T WORK The printer's wireless hardware might be going into a deep sleep. On the printer's control panel, navigate to Network > WLAN > Setup > Advanced Setup. Look for a power-saving or sleep setting related to the network and try disabling it, so the wireless radio stays active. HEADS UP If you're using a mesh Wi-Fi system (like Google Wifi, Eero, etc.), ensure the printer is connected to the main router node, not a satellite. Some satellites have issues maintaining connections with older wireless devices like printers.

Question 4

i get 'unable to print 32' error on the display, what does that even mean

Accepted Answer

DIAGNOSIS Error 32 is a communication error between the printer's main board and the laser/scanner unit. It often happens after a paper jam clear-out if something wasn't re-seated correctly, or if there's a loose connection inside. FIX Turn the printer off and unplug it for a full two minutes. While it's off, open the front cover and remove the toner cartridge. Look inside and gently press on any flat cables or connectors you can see to ensure they're snug. Reinsert the toner cartridge firmly until it clicks. Close the cover, plug the printer back in, and power on. IF THAT DIDN'T WORK The issue could be with the toner cartridge itself. A faulty cartridge can trigger this error. If you have a spare or can borrow one, try swapping in a different Brother TN-660 cartridge to see if the error clears. HEADS UP If the error persists after a power cycle and a toner reseat/swap, it points to a more serious internal hardware fault. The next step is usually a service call, as it could be a failing laser unit or main board.

Question 5

my brother printer is making a loud grinding or clicking noise when it tries to pick up paper

Accepted Answer

DIAGNOSIS That's the sound of the paper pickup rollers slipping or a foreign object in the paper feed path. The rubber rollers get smooth and glossy over time and lose their grip. FIX Power off and unplug. Open the front cover and remove the paper tray. You'll see a set of rubber rollers at the bottom of the paper feed area. Dampen a lint-free cloth with a little bit of warm water (not alcohol or cleaner, which can dry the rubber out more). Wipe the rollers thoroughly to remove any paper dust and restore tack. Let them dry completely before plugging the printer back in. IF THAT DIDN'T WORK The noise might be coming from the separation pad, a small rubber piece that helps feed one sheet at a time. It's located right where the paper first enters the machine. Check for any worn spots or debris on it. Sometimes a small piece of label or a staple fragment gets lodged in there and causes the click. HEADS UP If cleaning doesn't stop the noise and the slipping, the pickup roller assembly (part # PK- NV) is a replaceable part. It's a known wear item on these Brother models.

Question 6

trying to scan to my computer over wifi and it just fails every time, connection seems fine

Accepted Answer

DIAGNOSIS The scan drivers or the Brother software suite on your computer is likely the issue, not the network. The utilities can get corrupted or have permission conflicts, especially after a Windows update. FIX Go to the Brother support site and download the full 'Driver & Software' package for the DCP-L2640DW for your specific operating system. Uninstall all existing Brother software from your computer's Control Panel first. Then, install the fresh download, making sure to run the installer as an administrator. During setup, choose the 'Network Connection' option and let it search for your printer. IF THAT DIDN'T WORK Try a direct USB connection for scanning temporarily to rule out the network. If USB scanning works, the problem is a firewall or network permission. You may need to add an exception for the Brother software in your Windows Defender Firewall or any third-party antivirus you're running. HEADS UP Brother's software installs a utility called 'ControlCenter' for one-touch scanning. If you don't use that, you can often scan directly through Windows' own 'Fax and Scan' app by adding the printer as a network device there—it's a less finicky method.

Question 7

printer says 'toner life end' and won't print, but the cartridge is definitely not empty

Accepted Answer

DIAGNOSIS The printer's page counter has hit its limit, not an actual physical sensor. Brother cartridges for this model have a chip that estimates life based on page coverage, and it locks out printing when it thinks it's done. FIX You can temporarily override this to squeeze out the remaining toner. With the printer on, open the front cover. Press and hold the 'Go' (the button with the half-circle icon) for about 10-15 seconds until all the LEDs light up. The message should clear and you'll get a few dozen more pages. This is the built-in override procedure. IF THAT DIDN'T WORK The override only works if there's still a usable amount of toner in the cartridge. If it genuinely is empty or extremely low, the printer will refuse. Shake the cartridge gently side-to-side (cover the drum with paper to avoid dust) to redistribute the remaining powder, then try the 'Go' button procedure again. HEADS UP The print quality will degrade as you use this override—pages will get lighter and you might see streaks. It's a stopgap, not a permanent fix. Eventually you'll need a new TN-660 cartridge.

Question 8

my brother l2640dw just shows 'paper jam' but there's nothing stuck in there, i've checked everything

Accepted Answer

DIAGNOSIS Yeah, this one's common. The printer's sensors are seeing a phantom jam, usually because a tiny piece of paper debris or a lot of toner dust is blocking one of the paper path sensors inside the machine. FIX First, power off and unplug the printer. Open the front cover, the rear cover, and the single-page feed tray at the top. Get a flashlight and look deep into the paper path from both the front and rear openings. You're looking for any shred of paper. Use a pair of tweezers to gently pull out any debris you find. Then, take a can of compressed air and give the entire interior path a few good blasts to dislodge dust. Close everything up, plug it in, and power on. IF THAT DIDN'T WORK The secondary culprit is the toner cartridge. A damaged cartridge or one that's not seated perfectly can trigger the jam sensor. Remove the toner cartridge, inspect it for physical damage (especially the green drum on the side), re-seat it firmly, and try again. HEADS UP Be super gentle with the little paper pickup rollers when you're poking around. They can get nicked easily and then cause real feed problems later.

Brother DCP-L2640DW Wireless Compact Monochrome Multi-Function Laser Printer with Copy and Scan, Duplex, Mobile, Black & Whit

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