I'm not sure if this is an appropriate query for this forum.
I had a bad plug in one of the nozzles which wouldn't clear until I left a full piezo flush syringe attached over night.
THAT cleared it for sure but even though I put a goodly amt of bounty towel under the cart carrier, there was some mess.
Did this damage the electronics maybe? I did clean the capping station as per your video.
The error message was two blinking red lights on the trash button and the ink refill button. I took out all carts hoping that letting the printer sit for a few days, maybe it would dry out.... no idea.
I am glad I have a second R1800 so I could continue using my K7's to print. Thoughts? thanks.