HP Designjet 2500.3500cp Printer series - Manual (Page 115)

Working with Ink Systems
Replace the Ink System
4-19
3
Removing and Replacing the Ink Cartridges
1 Open the left door on the printer.
After you open the left door, the printer displays the message shown below on the
front panel. The blinking indicator shows which ink cartridge must be replaced. In
the example below, the yellow ink cartridge needs to be replaced.
C4704108
C4704036
Replace ink
Yellow
Cyan
Magenta
Black
cartridge(s)