HP 2000CP 2500CP - Manual (Page 116)

4-30 Service Tests HP DesignJet CP Series Printers
complete Ink Delivery System of the color that failed and try the test
again.
4 As a last resort, replace the Carriage Assembly
' page 8-42.
4 Press Previous when you have completed the test. The “D1400 Done”
message is displayed on the front-panel if the test exits correctly.