Hi! Just received a new ink cart for my Pro4000 and the day after I installed it all the ink was gone. I checked my maintenance cart but there wasn't an abundance of MBK. I took my side panel off and noticed all the MBK had dumped into the Ink Supp...
Dejan did you end up finding out what your issue was? I have the exact same issue and I'm looking down into the Ink supply mount and see all my MBK sitting down there.