Digital BW, The Print

I might have blown it by withdrawing MIS funnel-fill carts (to change from flush fluid to ink) from the printer while it was turned off. The LCD just reads WAIT. I waited a while; tied turning off and on, back to WAIT. After a while I tried turning off, unplugging, waiting 15min and plugging back in. Five hours later, still on wait.

Am considering putting the OEM carts back (with power on) and seeing what happens. Would appreciate any advice.
--John Wilton