Recently my Brother MFC-230C ran out of ink so I decided to buy some cheap replacements on eBay that were "guaranteed" to work. The first set worked fine for a month or two even though it appeared as though they ran out a little quicker than usual. When it came time to replace those I ran into nothing but issues. At first the black ink would show "no ink cartridge" and the colored inks would still show low or nearly empty. I managed to do a hard rest and get the black ink to show however this only worked for a short time.
Being fed up with these hassles I almost when out and paid for the original Brother ink cartridges to see if this would alleviate my issues. Then I came across a great tutorial on how to fool your ink sensors into thinking they are always full. Not only did this solve my issues with incompatible cartridges it also allowed me to use nearly all the ink in my carts before replacing them.
This worked on my Brother MFC-230C, and is verified to work on the Brother MFC-240C and Brother MFC-440CN and rother MFC-665CN, others might be similar if not the same.
See images below
- Pull the top up and remove the control panel, you'll see 3 screws under the top lid. You'll need to pry the panel out pulling towards you and up.
- Locate and unplug the connector with 9 wires (it should be labeled "cartridges" on the circuit card)
- Disconnect only the center wire (5th cable from either end). Its a bit of a pain to get out but I didn't want to cut mine right off until I knew for sure it would work.
- Reconnect the the 9 wire connector
- Close the lids and restart the printer
Although I've tested it on my own printer and it works fine for me there is still some risk involved and results can not be guranteed. Try this at your own risk!
Credit goes to cano14 over at Tech Support Forum for the information and the images.