HP DeskJet GT 5820 - Manual (Page 94)

b. Open the printhead access door and wait for the print carriage to move to the center of the printer.
CAUTION: The instructions in the following steps apply only when you install printheads during
initial printer setup. If printheads have been primed with ink, you must not open the printhead
latch. Opening the latch can cause permanent damage to the printheads.
c. Push down to open the blue printhead latch.
d. Remove the printhead from the carriage.
88 Chapter 8 Solve a problem ENWW