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Replacing the Hard Drive

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This document pertains to HP Pavilion Desktop PCs with the following case:
This document explains how to replace the hard drive in particular HP Pavilion desktop PCs.
WARNING:The edges of metal panels can cut skin. Be careful not to slide skin along any interior metal edge of the computer.
CAUTION:This product contains components that can be damaged by electrostatic discharge (ESD). To reduce the chance of ESD damage, work over a noncarpeted floor, use a static dissipative work surface (such as a conductive foam pad), and wear an ESD wrist strap connected to a grounded surface.

Before you begin

  • A Phillips-head screwdriver
  • The replacement hard drive
  • A printout of these instructions
  • The Certificate of Authenticity number from the Windows guide included with your PC if you are going to use system recovery.

About IDE drives and cables

Motherboards in HP Desktop PCs have two IDE connectors for two IDE channels. These are referred to as the Primary and Secondary IDE channels. A channel can support two devices using one ribbon cable.
A total of 4 IDE disk drives may be connected to the motherboard. The ribbon cable is a 40 pin cable with either 40 or 80 conductors (wires). An 80 conductor cable (ultra-ATA style) must be used for fast ATA66 and ATA100 disk drives.
When a pair of disk drives are attached to a cable they are designated as Master or Slave devices by the PC. The Master drive connects to the end connector, the Slave drive connects to the middle connector.
Drives should have their jumpers set to CS (Cable Select).
IDE disk drives are typically connected to the primary IDE channel on the motherboard. CD and DVD drives are typically attached to the secondary channel. Connecting a CD/DVD drive to the same channel that a hard drive is connected to, drastically lowers performance of the hard drive. Do not install hard drives and CD/DVD drives on the same channel.

Removing the outer cover

The outer panel covers the top, left, and right sides of the computer. You must remove the outer cover to access internal components.
  1. Using a #2 Phillips screwdriver, remove the three screws on the outer edges of the back panel.
  2. Slide the outer cover back back and then lift up.

Replacing the hard drive

Use the following steps to remove and replace the hard drive:
  1. From the open side of the PC find the two cables that go to the hard drive. They are the data and power cable. Remember the orientation of the colored strip on the data cable.
  2. Remove the power and ribbon cables.
  3. Remove the two screws that attach the hard drive cage to the PC.
  4. Remove the hard drive and hard drive cage from the PC. Note how the hard drive cage fits into the computer.
  5. Remove the four screws that attach the hard drive ito the hard drive cage. Set the hard drive cage aside.
  6. Set the new drive in the hard drive cage and align the screw holes in the hard drive to the holes in the hard drive cage.
  7. Attach the four screws you removed to the drive and hard drive cage.
  8. Attach the hard drive cage to the PC with two screws.
  9. Reconnect the data and power cable. Make sure each is properly aligned and firmly seated.

Replacing the cover

NOTE: Make sure that you have replaced all components inside the computer before replacing the outer cover.
  1. Standing behind the computer, lower the cover over the top of the chassis. Leave about a 25-mm (one-inch) gap between the cover and the front of the chassis.
  2. Slide the cover toward the front of the chassis to guide it into place.
    NOTE: To make sure the cover is replaced correctly, pull out on the bottom edges of the cover. If the bottom edge of the panel is secure, the cover is set. If the edges pull out, the tabs on the cover are not seated inside the grooves of the PC frame. Push the outer cover back and try again.
  3. Replace the three screws on the back panel.
  4. Reconnect cables and turn on the PC.
  5. Use the System Recovery discs to configure the hard drive software to the way the original software configuration. You can also partition and install a new operating system (not discussed in this article).

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