I've changed the black ink cartridge but it won't print in black

Paper jam means just that. Look for paper or a piece of paper jammed into a gear or stuck between a roller or even in your ink cartridge . When you put in your new ink did you take off the protective seal and run the HP software to check if it is reading the Cartridge ,You might want to read the instruction on how to install an ink cartridge. It might also help you ?

The printer requires both cartridges to have ink before the printer will initialize and operational. Even if you are only printing black and white both cartridge have to contain ink or the printer will error out. This is standard on all ink jet printers from every manufacturer. You will have to get ink before you can print.

Problem is with carriage unit.

try to find if the printer has a resetter tool online canon ink cartridges

Unplug the printer for at least overnight. I have 3 of these printers and all 3 have done this. All 3 came back after being unplugged for a long period.
Personally, I think a class action suit might be in order.

The problem is not with the ink-cartridges. You've proved that, by swapping BLACK cartridges.

The problem is that the ink-jets that spray the BLACK ink onto the paper are clogged.
Thus, no BLACK ink reaches the paper.

Open the HP Printing Assistant, and open Utilities, and run a few "print-head-cleaning" cycles, to try to unclog the print-head.

You have to refill both.

Be sure you are using genuine epson ink. Epson printers are "smart" and will not allow generic ink to work properly. Even after you replace a generic with a genuine it may take several print outs and alignments to get it to print again.

The printer is very good.I ve been using it for approx 1 year now.The printer works on a combination of both black as well as colour ink cartridges.If any of the cartridge is empty,printer will not print.Kindly call Kodak with your problems at 1800 421 6699 and they will take care of the issue for you.