HP Point of Sale rp5000 Hardware Reference Manual page 34

Hardware Upgrades
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6. Press and hold the drive release latch 1.
7. Slide the drive to the right of the bay 2, then pull the drive from
the bay 3.
Removing the Hard Drive
To replace the hard drive, reverse the above procedure.
When replacing the hard drive, transfer the four screws from the old
drive to the new one. The screws take the place of drive rails. You
will need a Torx T-15 screwdriver to remove and re-install the guide
screws.
If you have installed a hard drive that is not automatically recognized
by the computer, see
Guidelines."
www.hp.com
Appendix C, "Hard Drive Installation
Hardware Reference Guide