Printer message "Install Supplies" has

SOURCE: Replaced HP LaserJet 2840 catridges and now [?][?][?][?] ! error

The OEM cartridges have a chip on them. If the aftermarket supplies do not have the right chip, missing a chip, etc., the machine will not recognize. Placing the old cartridge back in without any toner can give off the same message.

Try rebooting the printer without a cartridge in. Then install the cartridge, either one, and see if that helps. If not, wait for the OEM to arrive.

SOURCE: My HP printer CP1518ni gives me an error message

The clear one's are the empty cartridges. Try replacing those.

SOURCE: Printer will not recognize ink

The toner (not ink) cartridges in your printer have a security chip attached on the top at the right side. For the printer to work that chip must have a very good contact with the corresponding pins - first make sure that they are spotless.
You will also need to clean the the print head assembly. The print head contacts should be dusted free using a can of compressed air. It would be a good idea to clean the entire assembly if there is time as this could cause other printing problems. After using the compressed air, take a small lint free cloth with a small amount of isopropyl alcohol and wipe the contacts clean.
If this doesn't fix it then either you ar using an non approved set of cartridges or the printer is defective - you will gonna have to call a repairman.

Doctor PC

• 7733 Answers
• Posted on Oct 27, 2010

SOURCE: I have an HP Photosmart

The Print Diagnostic Utility diagnoses and resolves common printing problems and communication problems, including:

If you prefer, you can skip this information and go directly to downloading the tool .

• Connectivity :
  • USB: Ensures that the USB connection from your computer to the HP product is working correctly.
  • Network: Ensures that the network connection between your computer and your network is working correctly. If the tool detects a network connectivity problem, you will be prompted to run the HP Network Diagnostic Utility for better results.
• Spooler : Automatically restarts the print spooler, which sends print jobs from the computer to the product, if it has been stopped.
• Online status : Checks if the product has been paused or set to offline, and then sets the status back to online if necessary.
• Device manager : Checks for problems in Device Manager that would prevent printing.
• Print queue : Checks for and clears pending print jobs in the print queue (a log of print jobs waiting to print).
• Port : Checks the port settings for the HP product.
• Driver : Checks for alternate-driver settings.
• Conflicts : Checks for conflicts with other drivers, such as other printer brands.
• Default printer : Checks the default printer setting and prompts to select the HP product as default (optional).

Doctor PC

• 7733 Answers
• Posted on Nov 21, 2010

SOURCE: When I replaced the black cartridge on my HP 6500

Try using the HP Print Diagnostic Utility in Windows - HP Customer Care (United States - English).

If you need more help come back.Post / thumbs / testimonial are welcome!