My PGBK cartridge stopped printing. After doing the cleaning recommended through the properties help menu nothing changed. The test pattern doesn't show anything where the PGBK pattern should be - NOTHING!

After removing all the ink cartridges, I removed the print head and soaked it in propyl alcohol overnight. Then blew it out gently with an aerosol 'air duster' and washed it again in fresh propyl alcohol followed by another blowing out. After gently blotting the print heads on a soft tissue and replacing the print head plus cartridges, it necessitated two deep cleans to get the inks through and all now works again.
Make sure that you switch off the printer at its On/Off switch and not at the supply. I think I may have done this and left the heads not parked properly - hence the drying out!

The printhead probably needs to be taken out of printer and cleaned.

just pop the ink cartridges out, then remove the print-head, fill a sink full of warm water, and swirl the print head around in the warm water. Blow through the color slits on the print head into the sink full of water it will get messy. empty the sink full of colored warm water.
rinse and repeat till your are satisfied its clean. dry it off with a cloth towel you don't care for, because it will get messy and covered in ink.




put your printer back together and it should work...it may take a few times...but i got my printer 'PGBK ink cartridge' working again doing this. or you can spend 100 bucks and buy a new print-head...my printer is a mp830 it came apart easily no tools or force needed... good luck and don't break your printer...its easy.

Silly me forgot to pull the air flow tab off the new cartridge! You may want to check your cartridge to see if you forgot to remove the tab.

This just worked for me on a Canon ip5200. Apparently dust had prevented my printer's copper contacts from detecting the cartridge's copper contacts.

In the procedure below:

• "puff air" can be your own breath in bursts as if you are whistling, or a compressed-air source such as a can from office-supply or computer stores. Do *not* use air streams with additives, such as WD40, hairspray, insect repellent, etc.

• "cartridge copper contacts" (at least in the i5200) are on a green circuit-board background color visible facing to the printer's front after you press your thumb on the cartridge's plastic tab and then push the cartridge upward (it pivots backward a bit).

1. Remove the PGBK cartridge.
2. Puff air on the cartridge copper contacts.
3. Puff air on the copper contacts of the cartridge socket in the printer itself. To see them, look downward into the cartridge socket. They looks like large versions of the contacts you can see on computer networking or modular-telephone jacks.
4. Replace the cartridge and close the printer door(s) as normal.
5. Test again.

Ok so after posting what i did was a cleaning then a deep cleaning. that seemed to have fixed it for me. Good luck to you all.