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Was your black ink a refill, or remanufactured cartridge, or 'Canon-compatible' ink?
If so, that might have caused the problem. And you may have to turn to Canon-OEM-original ink, at least for awhile, and after wasting away some 'compatible' ink in the following procedures.
If the black ink recently suffered a period of disuse of at least 7 days with the printer turned Off, then this procedure may free up black ink printing function again:
1. Clean the (black) printhead.
2. Wait 1/2 hour to several hours or overnight, leaving the printer On but unused (no print jobs, etc.)
This allows waste ink to soak into the printhead and hopefully dissolve dried ink etc.
3. Clean the printhead a second time.
4. Wait again (as in step 2 above) for 1/2 hr. to several hrs., printer On but unused.
5. Clean the printhead a third time.
Then test whether black ink is showing up at all in prints at this point. If it is, even faintly, then repeating this procedure will (eventually, at the cost of a certain amount of ink wasted in the process) clear up the clogged printhead.
After that fails, if it does fail, what you need to do is to decide whether replacing the printhead (which will cost something considerable, more than you would think usually) is better, given the printer's age, or whether it would be more preferable for you to replace the printer altogether with a new one (and hopefully recycle the old printer, always a good idea.)
So try the triple-cleaning-with-wait-times that I recommended, and get back to me if it doesn't work for you (so I can advise you further...)... or if it does help (- I always like to hear that something I recommended has worked!)