1. Turn off the computer.

2. Follow the guidelines for preventing static discharge in the User's manual.

3. Open the computer case. Use a Phillips screwdriver to remove the screws from the back of the computer.

   Note: Keep the screws together for reassembling the unit later. This procedure depends on which computer case you have.

Desktop case: After removing the screws, slide the case top as far as you can towards the front of the computer, then lift straight up and off the unit. This is easier if you turn the unit so it faces you. If the top does not pull forward, grasp the lower right portion of the case just below the power switch, and pull it away from the chassis as you slide the case forward. If the cover catches on something before it reaches the end, tilt it away to release it and then continue sliding it.

Note: Watch the cables inside as you slide the cover and note where each is attached. Sometimes floppy drive and hard disk cables catch on the cover and are pulled from their connections. If this happens, reattach them.

Mini desktop case: Remove the two screws shown. Then grasp the sides of the case top and slide it slowly and evenly towards the back until it is completely free of the computer unit.

Tower case: Use a flat-head screwdriver to pry the plastic back cover from the computer unit. Remove the screws shown in the illustration. Keep them together since they are a different size from the other screws in your computer. Carefully tilt the cover back and up to free the top edge from the front of the unit. Then lift the cover straight up off the computer.

If you are installing a second IDE hard disk, please follow the procedures listed in document 30019. This covers setting J8 jumper block on the hard disk for primary/secondary operation. After you have configured the hard disk, you are ready to install the hard disk and connect all cables.

Note: Depending on your computer case, you may need to remove mounting bracket from, or attach rails to, the new hard disk before it will fit into the hard disk bay. If you need to attach rails, you may need to experiment to find the best holes to use so the hard disk aligns with the opening in the hard disk bay.

Procedure to install the hard disk in the chassis:

Procedure to connect the hard disk cables:

1. Connect the ribbon cable to the connector at the back of the drive.

   Note: Be sure the side of the cable with the stripe goes to the pin 1 side of the connector on the hard disk, which is marked with a 1 on the circuit board, and is near the power supply connector. Some cables are also keyed so that they can only be inserted the correct way. It doesn't matter which cable connector you use, but the most convenient arrangement is to connect the ones closest together to the hard disks, and the connector on the long end to the motherboard or adapter card.

2. Connect the ribbon cable to the motherboard, local bus and mini desktop computers, or to the host adapter card. The colored stripe on the cable goes to pin 1.

3. If your computer has two IDE connectors on the motherboard, be sure to plug the first two hard disk, drives C: and D:, onto the primary connector and the second two hard disks onto the secondary connector.

4. The power cord is keyed and can only be inserted correctly. Connect it to the hard disk. Power cord are interchangeable; you can use any of them.

   When you have finished, reassemble the unit, run the BIOS setup program, and format the hard disk. See your User's Guide or document 30026.