Each toner (CMYK) has a life based on printed pages and stop working even if there's toner inside. No third part supplier, because the printer won't recognize it. And it's useless torefill it if you don't change some chip in each toner.
And then the fusor will also stop after some number of pages, no matter if the quality was still good. To replace it you spend more than you paid for the printer.
So OKI was in my banned list, now HP joins it.