I needed to print today. It had been four days since I had last used the printer. I turned on the Epson 4900, and ran a nozzle test. Two tiny Photo Black ink lines, and the rest blank. No labels on any of the patterns; that must come from the Black ink only. I ran a head cleaning cycle from the driver, another nozzle test, and now there was no Photo Black at all. I swapped in a new PK cartridge. No help. I ran a “powerful” cleaning cycle on the PK/LK inks. That got about two thirds of the PK nozzles working. I did another powerful cleaning cycle. That fixed it.
Why are these printers so flakey?
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