How do you check the ink levels of the cartridges on a hp deskjet 940c

For the HP 940c, there is only one light to indicate a possible low ink cartridge. The LED above the cartridge symbol (the only one without a button) will flash. (Note: this LED is the second from the left.) When you see the error code, open the printer's top cover. If the error is a low ink issue, the LED will stop blinking.

With the cover open, the cartridge carrier will move until the yellow arrow lines up with an icon on the printer itself. These five icons are in order from left to right (as you look at the cartridges) : tri-color ink cartridge problem, black ink cartridge problem, tri-color ink low, black ink low and cartridges OK. If both cartridges are low, replace the one indicated by the arrow. Then the cartridge carrier will move to indicate the other cartridge is low. (If only one has a problem, after you replace it, the carrier will move to the cartridge OK symbol.)

If HP offers the full-feature software for your OS, then install the software. Use the HP Deskjet Toolbox to get exactly which cartridge needs to be replaced without needing to be ready to replace both (or to monitor your ink level (approximate ink level)).

The manual for the Deskjet 940c is available as a PDF from HP: http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang=en&cc=us&docIndexId=64179&taskId=125&prodTypeId=18972&prodSeriesId=35985 .

I hope this helps.

Cindy Wells

You will need to replace the empty color cartridge to get the flashing to stop.

However you should still be able to print in BW. Check that the applications you are running are set to
BW and not color in the configuration menu. That should permit you to print in BW only.

Find another computer (laptop?) that is running Windows XP or Vista. Install the HP device-drivers.
Connect the printer to that other computer, and use the software to display the ink-levels.

the moving ink frame is probably pointing to a symbol such as replace color ink( three dots on ink cartridge picture). Replace color ink. You are probably printing your black and white documents with colored ink--always select black or greyscale.

check your user manual

Some HP ink refills have the exact same product number but the electrical contact tips on the back of the cartridge are not the same configuration, resulting in red ink only being printed. One example is the DeskJet color ink cartridge C1823D having multiple configurations.Find a printer just like yours that's working properly and compare the contact tips if possible. HP tech help is a joke on this one. Good luck!

Your printer software should detect it if you installed it.

try cleaning the contacts with a wet towel
from both cartridge (black and color) and in the printer
where the cartridges get in (metal pins)

Replace them both for optimal printing.

faithful is good..the toolbox you are referring to, is the HP toolbox? that's a driver issue, plain and simple..

check this link, and see what the HP icon reveals for this model and operating system..

by the way, you are my 2300th solution at Fixya, so you are entitled to a FREE tuneup4good for your PC..

that link also has some information related to that service.