How to install ink cartridge for hp640 fax - HP 640 Inkjet Fax Machine

change the Cartridge! come on! the instructions are IN the machine!

are you sure you have ink in the ink cartridge? Try just making a copy and check it out

INK CARTRIDGES ARE TIME SENSITIVE, check if the date in the box was current or expired.

If you replaced an ink cartridge while Near Empty was displayed on the LCD, the LCD may ask you to verify that it was
a brand new one. Example: Did You Change Blck? 1.Yes 2.No. For each new cartridge you installed, press 1 on the dial
pad to automatically reset the ink dot counter for that color. If the ink cartridge you installed is not a brand new one, please be sure to select 2.
WARNING
If ink gets in your eyes, irrigate them with water immediately and call a doctor if you are concerned.
If you wait until Ink Empty message is displayed on the LCD, the machine will automatically reset the ink dot counter.
If the Install message is on the display after you have installed ink cartridges, check that the ink cartridges are
installed properly.

Hello T There this may work for you, it has worked for many here I given this advice so gave it a try it could work for you. Generally when this happens, something has fallen into the printer, or a piece of paper has been jammed in there.

First step, remove the ink cartridge, and turn the printer upside down and gently shake it, see if anything comes out.

If nothing goes, or you can't hear anything rattling around, get a piece of cardstock paper (60lb or heavier) and gently push this through the printer, to see if it will help push out what might be stuck in there.
And gave the rode that the ink slides on a good clean and maybe a bit oil on cloth and wipe the rod with it.

Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks

Hello there this may work for you, it has worked for many here I given this advice so gave it a try it could work for you. Generally when this happens, something has fallen into the printer, or a piece of paper has been jammed in there.

First step, remove the ink cartridge, and turn the printer upside down and gently shake it, see if anything comes out.

If nothing goes, or you can't hear anything rattling around, get a piece of cardstock paper (60lb or heavier) and gently push this through the printer, to see if it will help push out what might be stuck in there.
And gave the rode that the ink slides on a good clean and maybe a bit oil on cloth and wipe the rod with it.

Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks

A “No Cartridge” error message on 1960c products is caused by third-party (non-Brother) ink cartridges
leaking ink onto the Ink Sensor PCB and shorting out the cartridge sensor. In order to resolve this issue, a new
Ink Sensor PCB will need to be installed.

it will not send or receive a fax if the error is still there. Clear the error by trying these steps:
-open cartridge door and remove the cartridge
-unplug the power cord at the back of printer
-after 30 seconds, plug the cord and turn on the printer. It will ask for the cartridge.
-Open the cartridge door and insert the cartridge
-close the access door
-if the error is cleared, try faxing again.

I hope this helps.

Regards,

probably you did not fix properly the ink cartridge.check the cartridge for proper seating.