Brother Office Equipment & Supplies - Page 6 - Recent Questions, Troubleshooting & Support

The top cover is open. Check the pin on the front edge of the cover, if it is broken, it will not contact the actuator.

You can find the original pn for back door consulting the parts guide manual for this equipment.https://www.anyservicemanuals.com/downloads/brother-dcp-7030-dcp-7040-dcp-7045n-mfc-7320-mfc-7340-mfc-7440n-mfc-7450-mfc-7840n-mfc-7840w-sm/

Error 4F unable to print is message related to the print head, and specifically means that your print head has either an electrical fault or that it has a temperature error.

Please consult the service manual.https://www.anyservicemanuals.com/downloads/brother-dcp-7030-dcp-7040-dcp-7045n-mfc-7320-mfc-7340-mfc-7440n-mfc-7450-mfc-7840n-mfc-7840w-sm/

Check the Ink Cover sensor for optimal operation.

Clean the scanner glass.

Please detail what is not working properly so that we can guide you.

The casing internal temperature thermistor has detected abnormal temperature in the machine. Check the thermistor for optimal operation.

Density sensor malfunction.You can solve the problem by consulting the service manual.https://www.anyservicemanuals.com/downloads/brother-dcp-9045cdn-mfp-9840cdw-service-manual/

you have a bad drum... it needs to be replaced I’m happy to assist further over the phone at https://www.6ya.com/expert/norman_d2fa496dce30c65d

print unable 4f

Sorry to say this error refers to a print head failure. It is not a user changeable part. It will need repairing by a Brother service agent and it will probably cost more than the printer is worth.

Question edited for full 'make model (what it is)'. Question moved to correct category. If it is only on one key, it will be the contact under the 'R' key. Strip down, clean with electrical contact cleaner, check board for cracks. https://www.google.com/search?q=GX6750%2C+letter+R+not+working ..

You can get best brother printer support at Toll Free Number ( 1-877-769-0969 ). Brother Printer Tech Support number ( 1-877-769-0969 )

Question edited for full 'make model (what it is)' Question moved to Brother HL category. chapter 3 onwards of the manual. The drum light means you need a service call. https://download.brother.com/welcome/doc002127/ZLe_UG_eng.pdf ..

https://elektrotanya.com/brother_fax1835c_1840c_1940cn_mfc3240c_3340cn.pdf/download.html (search "ink absorber box")

disconnect all usb cable from computer .power off again power on press & hold down go button press t times if print , reset printer drive in your computer or not print test page replace drum unit .

There are a few things that you can try if your Brother HL-2140 printer will not turn on. First, check to make sure that the printer is properly plugged into an electrical outlet. If it is, then try resetting the printer by unplugging it from the outlet and then plugging it back in. If neither of these solutions work, then you may need to contact Brother customer service for further assistance.

Probably just needs cleaning and lubrication. Get a can of electrical contact cleaner and some sewing machine oil. Remove the daisy wheel and spray the carrier and the striker mechanism. Put two drops of oil on anything that moves or spins. I would replace the ribbon and correction tape as a matter of course. Not much details on it, they are curios from the past now. there are however ribbons and consumables. https://www.google.com/search?q=brother+ce-51+typewriter ..

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