Epson 3800 Black Switch Change

[gherman]

I'm hoping someone can help. I have an Epson 3800 with has the infamous back switch go bad. I opened it up and swapped out the switch with a new one. Previous to doing that, I swapped out all of the dampers. After swapping the dampers it printed all channel with the exception of Magenta. Since Magenta was also shared with the black, I thought it was time to replace the switch. When I put back together the nozzle check is totally blank. I did an initial fill via adjwiz and still nothing. I should add that I'm using Piezo Flush and the cartridges did go down after the initial fill.

Any ideas of what is wrong?