CAUTION: Perform step 1 of the following procedure only after you are certain that it is safe to do so. If the computer is connected to an electrical outlet, Dell recommends turning off AC power at the circuit breaker before attempting to remove the power cables from the electrical outlet. Use the utmost caution when removing wet cables from live power.

1.Turn off the computer and disconnect it from the AC adapter. Then disconnect the AC adapter from the electrical outlet. Turn off any attached peripherals and disconnect them from their power sources and then from the computer.

2.Ground yourself by touching one of the metal connectors on the back of the computer.

3.If the media bay or MegaBay slot is wet, remove the device from the bay. If the PC Card slot is wet, remove any PC Cards. Put the device and cards in a safe place to dry.

4.Remove any installed batteries.

Wipe off each battery and store it in a safe place to dry.

5.Remove the hard-disk drive.

For instructions, refer to “Installing a Hard-Disk Drive” in Chapter 2.

6.Remove the memory module(s).

For instructions, refer to “Installing Memory Modules” in Chapter 2.

7.Open the display, and place the computer across two books or similar props to let air circulate all around it. Let the computer dry for at least 24 hours.

Place the computer in a dry area at room temperature. Do not use artificial means to speed up the drying process.

CAUTION: Before continuing with the remainder of this procedure, verify that the computer is thoroughly dry.

8.Ground yourself by touching one of the unpainted metal connectors on the I/O panel.

9.Replace the memory module(s).

10.Replace the memory module cover.

11.Reinstall the hard-disk drive.

12.Reinstall the media bay or MegaBay device and PC Cards that you removed in step 3.

13.Replace any batteries that you removed in step 4.

14.Reconnect the computer and peripherals to an electrical outlet and turn them on.

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Basic Troubleshooting 3-11

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Dell 7500 manual Support.dell.com Basic Troubleshooting