Basic Troubleshooting 2-5SEC cartridge/heat sink assembly and reinstall it as described in “SECCartridge/Heat Sink Assembly” in Chapter 4, 5, 6, or 7, as appropriate foryour system.To reseat a DIMM, remove it from its socket and reinstall it as described in“DIMMs” in Chapter 4, 5, 6, or 7, as appropriate for your system.If you need to reseat an expansion card, remove it from its connector andreinstall it as described in “Expansion Cards” in Chapter 4, 5, or 6 or in“Expansion Card” in Chapter 7, as appropriate for your system.4. Verify that all jumpers are set correctly.For information about these jumpers, see “System Board Jumpers” inChapter 1.5. Check all cable connectors inside the computer to verify that they arefirmly attached to their appropriate connectors.6. Reinstall the computer cover.7. Reconnect the computer and any attached peripherals to their powersources, and turn them on.Does the problem appear to be resolved?Yes. No further steps are necessary. Terminate the procedure.No. Proceed to the next sections, “Eliminating Resource Conflicts,”“Running the System Diagnostics,” and “Getting Help.”(OLPLQDWLQJ5HVRXUFH&RQIOLFWVDevices within the computer may require dedicated memory spaces, interruptlevels, or DMA channels, all of which must be allocated during installation ofthe devices. Because a device may be installed at a different time, it is possiblethat the same resource is assigned to two or more devices.Resource conflicts can result in disorderly or erratic system operation or failureof the system to operate at all. If you suspect that resource conflicts mightexist, check the system and reassign the resources as necessary.5XQQLQJWKH6\VWHP'LDJQRVWLFVThe OptiPlex GX1/GX1p systems use either diskette-based or server-baseddiagnostics. The OptiPlex NX1 systems use either server-based, hard-disk–based, or (optionally) diskette-based diagnostics using an external diskette-drive kit connected to the computer as shown in Figure 2-1 and described in“Diskette-Based Diagnostics” found later in this chapter.