Stylus Pro 4880 Field Repair Guide 1/17/08
Prime, On or Off Printer Component, Software Item, LCD Display, Printer Button  Page 215.
Prime, On or Off
Prime, Initial Fill, and Charge mean the same thing. They all refer to filling the Ink System with ink. 
Controlling the Prime function requires Setting, or Resetting the Init.Fill Flag.
Init.Fill: Reset = The Printer is already primed.
Init.Fill: Set = the Printer will prime the next time it is turned on.
1. Turn on the Printer while depressing the Pause, Down, and Right buttons. The Printer will 
display SELF TESTING2.
2. Press the Right button once. The Printer will display SELF TESTING2: Test.
3. Press the Down button until the Printer displays SELF TESTING2: Parameter.
4. Press the Right button once. The Printer will display Parameter: Initialize.
5. Press the Down button once. The Printer will display Parameter: Update.
6. Press the Right button once. The Printer will display Update: InkParameter.
7. Press the Right button once. The Printer will display Init.Fill: Set.
7.1 Press the Down button to change between Init.Fill: Set, and Init.Fill: Reset.
8. Press the Right button once. The Printer will display Update Param.?.
9. Press the Right button once. The Init.Fill flag will be set.