Troubleshooting Your Computer 3-199. Reinstall any diskette, hard-disk drive, orPC Cards that you removed in step 3.10. Replace the battery.11. Reconnect your computer and peripherals to ACpower, and turn them on.12. Does the computer work properly?Yes. The problem is resolved.No. If the computer is able to boot, run the Dell diag-nostics to identify computer damage. (See Chapter 4,“Running the Dell Diagnostics,” for instructions.) Ifthe computer is unable to boot, see “Troubleshootinga Power Failure” found later in this section. If youcannot identify the damaged component(s), call Dellfor technical assistance. (For instructions, see Chap-ter 5, “Getting Help.”)Troubleshooting a Damaged ComputerIf your computer is dropped or damaged, use the follow-ing procedure.NOTE: Before you begin this procedure, make sure thatthe SYSTEM SWITCH option in the System Setup program isset to ON/OFF. For instructions, see “Using the System SetupProgram” in Chapter 2.1. Turn off your computer, and disconnect it fromthe AC adapter. Then disconnect the AC adapterfrom AC power. Turn off any attached peripher-als, and disconnect them from their powersources and then from the computer.2. Save all your work, exit any open application pro-grams, and remove the battery.3. Open the I/O panel door, and ground yourself bytouching the unpainted metal surface of the I/Opanel.4. Remove the options cover from the bottom of thecomputer. Remove and reinstall any memorymodules in the memory module sockets, and thenreplace the options cover.To remove a memory module, carefully spread apartthe inner metal tabs of the memory module socket justfar enough for the memory module to disengage fromthe socket (the module should pop up slightly). Then liftthe memory module away from the socket.To reinstall a memory module, align the memorymodule’s edge connector with the slot in the centerof the memory module socket. Press the memorymodule’s edge connector firmly into the socket.Pivot the memory module down until it clicks intoplace. If you do not hear a sharp click, remove thememory module and reinstall it.NOTE: Memory modules are keyed, or designed, tofit into their sockets in only one direction. The sock-ets on the system board are notched so that thememory module can be firmly seated only one way.5. Verify that any installed PC Cards are properlyseated in the PC Card connectors. Verify that thehard-disk drive is properly installed.6. Replace the battery.7. Reconnect your computer and peripherals to ACpower, and turn them on.8. Run the Dell diagnostics to verify that the computeris operating properly. (See Chapter 4, “Running theDell Diagnostics,” for instructions.)9. If the computer does not operate properly, makea copy of the Diagnostics Checklist found inChapter 5 and fill it out. Then call Dell for techni-cal assistance. (For instructions, see Chapter 5,“Getting Help.”)Troubleshooting a Power FailureOccasionally, you may experience a power failure in allor part of your computer. A total power failure is indi-cated by the absence of electrical activity (such as lightsand sounds) from the keyboard, display, hard-disk drive,and diskette drive. In a partial power failure, one or moreof these indicators shows that there is power to a part ofthe computer.To determine if there is any power to the computer, make acopy of the Diagnostics Checklist found in Chapter 5 and fillit out as you complete the following procedure.