I have an Epson 3800 that sat unused for 5 months. I bought a bottle of PiezoFlush and followed the cleaning instructions in the video. After 48 hours the paper I used under the head showed color from all 8 heads but a cleaning and print shows no ink printed. I bought the Epson Adjustment Program so I could do an Initial Ink Fill. The program finds the printer but returns a communication error when I select any function.
This printer has a CSI system with large ink tanks. They are all pressurized and 3/4 full of ink.
I have changed the cable and deleted and reinstalled the printer (win7) to no avail. It is installed on USB001 and there are no other ports available to use.