HP Point of Sale rp5000 Hardware Reference Manual page 38

Hardware Upgrades
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5. Insert the rear screws of the hard drive 1 into the rear J-slots.
Slide the drive 2 toward the back of the drive cage until the front
screws are aligned with the front J-slots. Then lower the front of
the drive. Continue to slide the drive all the way back until it
locks into place.
CAUTION: You cannot install a secondary hard drive if an optical drive
is installed.There are not enough power supply connectors to support this
configuration.Doing so could result in damage to the computer. See
"Removing an Optical Drive or Diskette Drive" for instructions on
removing an optical drive and installing a bezel blank.
If replacing a diskette drive, the guide screws (front and rear) will line
up on the J-slots. Insert the guide screws into the J-slots, then slide the
drive toward the back of the drive cage until it locks into place.
Installing a Hard Drive into the 3.5-inch Drive Bay
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