Canon mg5750 printer problem

[#1]

I have the above printer. It's been fine for years but yesterday the black pigment started playing up. I did a nozzle check and it was only printing half of the check on that ink. I've attached a picture. I've done cleans and removed the print head to manually clean but no joy. It looks like a printer issue rather than a clog, as it's cutting off exactly half of the pattern. Anyone any ideas. I'm reluctant to buy a new head in case it's the printer board and heads are about £30 on eBay.

Edit. I can't seem to attach a file????

[#2]

@penfold 

I’ve been through this with one of these printers. I removed the head and soaked it in diluted isopropyl alcohol, then even the stuff neat. I cleaned the electrical contacts very carefully etc. without success. After checking the cost of a new print head I put the money towards an Epson Ecotank MFP.

[#3]

Thanks. 

The printer is a good few years old, but I hate waste. It's a shame a new head is almost the cost of a new printer and not guaranteed to fix the issues. 

Anyone any advice on a good mfp?? Must admit I do like canon. 

[#4]

I had 2 or 3 inkjets through the years, luckily I used the ones where the ink cartridge WAS the printhead. But they still got clogged, so needed yet ANOTHER ink cartridge.

I now have an HP colour laserjet: if you select carefully, not only aren't the printers all that much (more than an inkjet, but there you pay for the printer with the expensive ink!) compared to the professional lasers, but you can get the toner cartridges (refills, never had an issue) for under 20 quid each, sometimes under 10.

And it probably prints a LOT faster than an inkjet, especially if it's just B&W