I hava a Hp OfficeJet Pro K550 with Continuous Ink System. All four ink levels are above the red line. When I try to print it will print one page and then the trouble light and all four ink level lights will start blinking.

Turn off the printer and clear the print que (if you tried to print more than one page).

Turn the printer back on and you are ready to print one more page.

I have tried removing and replacing the Continuous Ink System. Putting original cartridges back in. shutting off the power to the printer. Disconnecting and reconnecting the printer from the computer. Rebooting with the printer powered up and powered down. Rebooting with the printer connected and disconected.