My hp2600 printer says carriage jam and I have already cleared it. I can't see anything blocking it but when i hit o.k. it makes a slight grinding noise but the carriage moves back and forth fine. I have opened the cover and removed the back clean out door and cleaned all surfaces that I can access with spray air in case any small particles would be cleared that might be causing the obstruction. After resetting the printer and trying multiple times, the error message won't go away. Please HELP! Thanks~!

Hello there
You may not see a paper jam.

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