Cannot print Black on anything...

Your printer works with the PGI-5BK cartridge, that are in fact just ink-tanks, the printhead being apart of the tanks, so if the cartridges are not empty, it cannot be because of them. It doesnt matter if you replace the cartridge, the problem is in the printhead.

If the problem occured just a while ago, you should consider that NOT PRINTING a long time (30 days) with a printer can lead to ink drying out in the printhead, clogging the nozzles. OK, now it comes: If you have some tehnical skills, you can remove the cartridge and desassembly the printhead (where the cartridge are in) and do the following:

Put a paper-tissue on a small plate (like a coffee-cup plate), then put some boiling water on it, just 2~3mm of water over the tissue.
Put the printhead with the nozzles part downside on the tissue, in the hot water.
Let it stay there in the water 30 min.
Put the cartridges back on the printhead (without installing it in the printer), rap it in an other clean tissue, than shake it strongy as if you want to force ink to get out trough the nozzles. Then clean gentle the nozzle part of the printhead on some sheets of tissue.
Get the cartridges again out of the printhead, install it in the printer, then install the cartridges again and run a few cleaning processes from the printers maintenance software.

It should work. If you dont have the tehnicall skills needed, Canon gotcha, or you can visit a local specialist to make all this for you, they usualy have better equipmens, as ultrasonic cleaners and special solvents that makes all this easyer.

Rate the solution if it helped you!

Thx.