Gray printing Officejet Pro K550 problems

Hello.

I use a HP Officejet Pro K550 (STD) as well as a new Acer Veriton PC, equipped of Windows 7 Professional 64-bit O.S.

For normal printing, up to today, it works well, but they are a couple of days, instead, if I print an image, by selecting the "Gray Scale" - high quality option in the printer properties, everything that fate, causing printed in RED scale!

If instead, I select 'Gray Scale - only black ink', it prints normally.

What is going on?

The cartridges are always at the right level (Black XL just replaced) and even after using the utility Scan Doctor, it seems everything is OK... but this isn't reallly so OK.

What can you tell me?

I have to print several copies in the next few days and wouldn't no more free time, paper and inks...

Thanks for the help!

Hi robevix,

Welcome to the Forums of HP consumer printer.

When using gray scale - high quality, he used some color to enhance black. You can browse some general troubleshooting that might help solve the problem:

http://support.HP.com/us-en/document/c01956550

Tags: HP Printers

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