I've flushed PiezoFlush through all ink stems on the head (had to get some silicone tubing from interstate). Easily flushed, needed very little pressure. I've reassembled the head assembly and after all this work - machine won't power up!
Have tried two different power cables, but I guess there's a short somewhere. Very frustrating. I press the power button on the 4800 and nothing happens. I've taken the print head carriage apart again and checked that all was OK. Seems to be.
I guess I'll have to call Epson after all. I live a long way out of Sydney, Australia. I doubt there's a technician out here. Taking the machine into Epson for a service will be a huge task. I'll call them in the morning to see if there's a technician anywhere close by. I've been told by a local professional printer/gallery owner that there's nobody around here.
Immensely frustrating. All mechanical tasks went well - dampers replaced, early power cleans went OK, head flush went flawlessly. Now the machine is completely silent. I pressed the power button thinking I'd do a couple of power cleans and a nozzle check and - nothing.
Is there any routine you can suggest to check for obvious electrical faults?
Yours truly and ready to take the 4800 to landfill - Mike Trebert