I installed original HP black and color cartriges. Since then my printer prints completely off, with areas on top of other areas as well as printing the same data two times- one ontop of the other.Any ideas?

Try to reset color ink level ,see how in the following link
http://atta-metro.blogspot.com/2010/03/reset-ink-level-printer-hp.html
after you complete , reset make sure your file free form colors , other wise print will ask you for change color , hope this help you

Mohamed Hejazi
Afaqnama - Tripoli Libya
Ipg@hplibya.com

as long as the color print cartridges remain in the printer you should be able to print in only black and white.
If the error message does not come up and prompt you to chose this option, you should be able to tell the printer to print in black .

(1) go file print or print
(2) a gray box will pop up click on properties
(3) Click color
(4)click gray scale

This should do it for you!
(5) select black print cartridge only

uninstall the software by going into add/remove programs. Then look at the color cartridge and make sure its an original HP cartridge and not one of the 3rd party type of color cartridges. Try to use originals if you can so you don't run into the printer rejecting them.

With the operating system clean of the software go thru the steps in this guide to make sure everything is being installed properly:

http://h10032.www1.hp.com/ctg/Manual/c00238458.pdf

This will make sure that the cartridges are installed and that the software is being reinstalled so nothing is corrupted.

If the printer is still blocking print jobs or rejecting cartridges then you know that its either a printhead problem or a main board issue, either way you would have to get the printer replaced.

I have just resolved the "Install black cartrige" issue on my printer I am not sure if it will solve everyone's problem but these are the steps I took to solve the problem.

1. removed the black cartrige.
2. removed all the paper from the tray and noticed that one of the pages was a little jammed.
3. I then turned the printer on and off again and still encountered the "Install black cartrige" error message.
4. I then put the black cartrige back in the the printer and restarted the printer.
5. When the printer restarted it started to initialize correctly and I perform some test prints to confirm that it was back up and running.

Yes. The printer won't operate without both cartridges installed, even if one is empty.

I inserted new black ink cartrige. Changed setting to black print only. Color cartridges are low but should be ok if only printing in black. However, it will not print. It is a Brother 420CN.

Thanks.

print cartridge colour ink is not workink fix with hp print

Cartridge Description
Zone 1
small black inkjet print cartridge
HP 94
small tri-color inkjet print cartridge
HP 95
large tri-color inkjet print cartridge
HP 97
photo inkjet print cartridge
HP 99

First with a clean soft cloth and a very small amt of alcohol clean off the underside of the printer carridge (the holder for the print heads) also where the print heads cleaning station is clean out any large masses of congealed link. Then remove the ink cartridge in question and with a pencil eraser gently rub the contacts and both the cartridge and the carridge replace the cartridge. Using the software tools for the printer clean and align the printheads ( if there is an option to do so). If this dosn't fix the problem try a different ink cartridge.

they probably are dried up if they were in storage