My printer is not printing black I've done all cleaning

First, skip the power flush—it wastes ink and fills up your waste ink pad. This unit is built on the non-serviceable pad chassis. It's sold as the ET-2400 in North America, made for big box stores to sell a cheap EcoTank, generally under the EP or ST label in Japan, L in the EU; it's the same printer. It does more harm than good unless the main pad is chipped. IF YOU RAN THIS, CHECK HOW FULL THE PAD IS! The door is on the side with the single screw - if it's half full or more, plan on replacing the pad and buying a WIC reset key from WIC reset tool or find the leaked Epson tool if you can still get them like the old 88/69/68 cartridge based Epsons.

Due to the CISS system, unclogging these is more complex than unclogging tank-based printers. When you flush the head on these with a solvent (such as the many sellers who have it on Amazon or using InkjetMall PiezoFlush) is you need to do the usual steps - purge it, get it through the printhead and let it sit for deep clogs; that hasn't changed one bit from the cart based Epson hardware.

NOTE: For the Epson ET-series, you probably want dedicated syringes for this portion - one set for the flush, one for the dummy carts.

The difference is due to the CISS tanks, where when you remove the dummy cartridges, air tends to sneak in there, so you need to get a standard syringe for all 4+ colors and purge them all immediately after doing the head flush procedure. What you do not want to do is mix and match the syringes as it will destroy the printhead - one per color. If you have a 5 color printer, you ABSOLUTELY will need 5; same for the 6+ color units. You can usually buy them online in 5-10 packs for very little, but what I have done (before things like the opioid crisis largely ruined this) is I have sometimes been able to get them from the pharmacy after explaining I need them to unclog a printer, and it worked; even for the 6+ color printers. You probably can't do that NOW, but it's worth a try even today. If you do this before purging the head and keep some ink in the syringe while it's purged, it will stay air free and shouldn't leak, especially if you do not mess with the syringes or move them around, if you can find a way to "seal" the system temporarily.

NOTE: I would not reuse the head flush syringes on the dummy carts - use a fresh set to avoid contaminating the ink as you'll need to discard all of the ink in the system, do a full flush and then add fresh ink from a retail bottle set.