A few observations:
* "x900s are meant to be production machines." Where is this coming from? Where is the evidence? If that is so, then Epson would need to make that clear as not to sell printers to people who clearly would not "qualify" to use/own one. As a matter of fact, I have talked to Epson management people and they clearly expressed interest in selling these printers to more than just "production" folks, so I guess that it is safe to write that Epson never intended x900 printers to be only production machines.
* Eric, you don't have a clog anymore, and your current situation is probably not due to a clog. As posted much earlier in this epic saga, I have collected data that so far shows that most printers affected by this "dead head syndrom," have that occur in LLK. So, yes, especially with this thread, we learn that other colors can be affected too, albeit so far not cyan for instance, one of the most clog prone color in the x900. Beyond that, verified experimentation establishes that LLK hardens much less than cyan for instance, it remains more fluid much longer. It is therefore nonsensical to imagine that it could clog more, and as a matter of fact, most users would agree that LLK clogs less than most other colors, especially cyan and yellow for instance. This goes further in demonstrating that typically a head failure on the LLK channel cannot be caused from actual clogging. Now we do not know if Eric's case is exactly similar as far as the causes go, but I tend to think that it has the same symptoms, except for the color(s) and that it therefore is likely to be actually the same problem on different colors.
* Eric and the rest of us affected by this have a head with either premature delamination, most likely in the upper chamber, or fried nozzle connections. A good way to eliminate the delamination theory would be indeed to flush thoroughly the head from the nozzles out, reinstall it and see if anything has changed? If delamination is the cause, then surely flushing the head with cleaner in the opposite direction as the normal flow, should have a tendency to clean the particles that presumably obstruct the filter before the nozzles. If delamination is the problem, then surely such a job would change the situation, the physical obstruction would have a tendency to either be expelled, or at least move. So by comparing a nozzle check done before and after, there should be a noticeable difference.
* But I am leaning more toward a "frying" of the nozzles'connections, as the issue does not seem completely in line with the normal symptoms and behavior of delamination. Except that the frying could not possibly due to blockage or heat, given what I have observed both in my printer and the rest of the cases that I know.
