Question about Brother IntelliFAX 1840C Plain Paper Inkjet Fax

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I have changed all of my ink cartridges;but the black mode will not print,the color is working fine.

How do I trouble shoot this problem?

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Re: I have changed all of my ink cartridges;but the black...

After replacement of each ink cartridge the machine will display "Did you change?" for each colour. If one or more do not come up with this message you may have a problem.

Check each cartridge for the black flag is moving up and down with the liquid in the ink cartridge. If it stuck firmly tap it on a table until it is freed.

Another problem if the black sensors in the ink supply unit are pushed back it may not read the cartridges. If visably they look pushed back (usually only two) I can let you know how to correct.

Finally the mainboard in the machine can fail causing some inks not to read but you can not resolve this yourself.

Posted on Jan 29, 2008

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I have a all in one color LC61 printer, do all colors have to be filled to print blk only?

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Black cartridge problem device documentation. HP Officejet 4500

This type of HP 901 ink cartridge error ("Refer to Device Documentation", etc.) condition is likely an internal micro-electronic failure inside the HP 901 (or 901XL) black ink cartridge. These failures typically occur due to natural degradation of internal micro-electronics over time and can occur with brand new ink cartridges.

To confirm root cause and check the internal electrical condition of both black and color ink cartridges, please execute the 'Tap 41' cartridge's electrical diagnostic test below (refer to procedure B).

CAUTION: Be advised, the use of remanufactured ink cartridges is considered somewhat unreliable since the cartridges are already on their 3rd life when purchased new (off the internet or at select retailer stores). As well, the use of compatible/clone cartridges (i.e. sold thru the internet from China) are known to be problematic and may cause printer errors.

NOTE 1: Unfortunately, alignment pages and internal self test prints will usually print Ok even if the cartridge is internally electrically damaged. Do not use these test pages as a proxy for determining whether a cartridge is good or bad, only the 'Tap 41/43' diagnostic test report can yield this information.


A. Ensure BOTH carriage/flex cables and BOTH ink cartridge contacts are thoroughly clean before proceeding:

B. Validate the cartridge's electrical health by running the 'Tap 41' diagnostics test. Refer to 2nd video procedure at the following link on how to activate and read the service test:

a. Load Letter/A4-size paper into paper feed tray.
b. If any lights are blinking, first press Cancel to attempt to clear.
c. Press the * and # keys simultaneously.
d. Enter 124 at keypad. The 'Underware' menu should be displayed.
e. Use the arrow keys to navigate to the System Menu. Select Ok.
f. Use the arrow keys to navigate to the 'print-mech tap test'. Select Ok. Printer screen should display "code = 0".
g. Use the arrow keys to enter "code = 41" (or just enter 41 on keypad). Select Ok. The Tap 41 diagnostic test pattern prints.

--- Providing the HP 901 (or 901XL) color cartridge is partially functioning the Tap 41 diagnostic test print will be printed (this is a forced service print test which is mainly used for the evaluation of ink cartridge electrical health - the printer will attempt to print the diagnostic test print). A good HP 901 color cartridge should display 1248 good nozzles, while a good HP 901/901XL black ink cartridge should show 336 good nozzles. If the results yield anything different then the ink cartridge is likely damaged and will need to be replaced. Refer to 2nd video on how to read the diagnostic test print:

---- If the printer attempts to print the diagnostic test pattern (1 page) then the printer is generally considered operational and functional, if nothing is printed, but the printer attempts to print the pattern, then the tri-color ink cartridge is either empty, clogged or severely electrically damaged (black ink cartridge is not used). You can remove the tri-color cartridge, reactivate the tap 41 test and the printer will print the diagnostic test print in black ink.

For more diagnostic tests and error bypass procedures, please visit the Inkjet411 support center:

Hopefully this helps....

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I tried everything-no good. I suspected the pinholes in the printhead were clogged with dried ink because I didn't change cartridge in time.
The fix that worked perfectly was when I hacksaw top off old black cartridge & removed all foam wicks so now I had a funnel(can see clear thru). I installed the cartridge & filled it with alcohol, printed page & did head clean; then printed few more pages. Problem cleared almost immediately. I then soaked up extra alcohol inside cartridge with paper towel. Removed modified cartridge & installed good one. I guess this could be done for colors as well. I don't know if this is a proper procedure, but it sure worked well for me.

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How do i change my ink cartridge on my mfc-295cn

Hello and welcome to FixYa;

  1. Open the ink cartridge cover. If one or more ink cartridges is empty (for example Black), the LCD shows "Cannot Print (Replace BK Ink)" or "B&W Print Only."

  2. Press down on the release lever to unlock it and take out the ink cartridge for the color shown on the LCD.

  3. Open the new ink cartridge bag for the color shown on the LCD, and then take out the ink cartridge.

  4. Turn the green knob on the protective yellow cap clockwise to release the vacuum seal, then remove the cap (1). You must hold the ink cartridge as indicated in the picture below.


  5. Each color has its own correct position. Insert the ink cartridge in the direction of the arrow on the label.

  6. Gently push in the ink cartridge until it clicks, and then close the ink cartridge cover.

  7. The machine will automatically reset the ink level.
I am sending you the link that shows you illustrated pictures to help you through this.

You should be good to go!

Let me know how this worked out for you. If my solution helped you, please rate this solution!
It doesn't cost anything and only takes a second, but it is greatly appreciated.

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My HP 640 will not print. Ran the test, no print.

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Print nozzles will be at bottom of cartridge...Make sure that u do not wet copper contacts ... first try using dry paper towel and check where ink comes and follow the procedure given below....

Cleaning procedure
  1. Remove the print cartridges.
  2. Moisten a clean, lint-free cloth with water.
  3. Gently hold the cloth against the nozzles for about three seconds, and then wipe in the direction shown below.
  4. Using another clean section of the cloth, gently hold the cloth against the contacts for about three seconds, and then wipe in the direction shown.
  5. With another clean section of the cloth, repeat steps 2 through 4 above.
  6. Allow the nozzles and contacts to dry completely.
  7. Reinsert the print cartridges.
  8. Print the document again.
  9. If the print quality does not improve, repeat the steps for cleaning the nozzles and contacts up to two more times.
  10. Check the warranty and try to get replaced

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