Dell OptiPlex GXa Service Manual - Page 60
Eliminating Resource Conflicts, Running Computer Diagnostics - boot disk
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Eliminating Resource Conflicts Devices within the computer may require dedicated memory spaces, interrupt levels, or DMA channels, all of which must be allocated during installation of the devices. Because a device may be installed at a different time, it is possible that the same resource is assigned to two or more devices. Resource conflicts can result in disorderly or erratic system operation or failure of the system to operate at all. If you suspect that resource conflicts might exist, check the system and reassign the resources as necessary. Running Computer Diagnostics The OptiPlex GXa systems use either diskette-based or server-based (EM systems only) diagnostics. The OptiPlex NX 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" later in this Chapter. Server-Based Diagnostics (EM System Board Only) The server-based diagnostics contains tests that aid in troubleshooting major components of the computer. To run the server-based diagnostics, follow these steps: 1. Turn on all peripherals and the computer. If the computer is already on, press to reboot the computer. 2. If necessary, enter the System Setup program and set the computer to boot from the network. Highlight the Boot Sequence field (see Figure A-1). Either press to restore the default settings, or press and the right-arrow key to display the Device List screen (see Figure A-2). Then move the LANDesk Service Agent above drive C: on the Boot Device Priority list. Press to reboot the computer. 3. Press immediately after you see the following message: Press for Configuration Services or or to cancel. If you wait more than 5 seconds before pressing , the message disappears and the load operation continues. Let the system complete the load operation; then shut down the system and try again. 4. Press immediately after you see a menu to enter the firmware update services. If you wait more than 3 seconds before making a selection, the system automatically enters the software services. 5. Enter a user name and password at the logon prompt. Contact the network administrator for information on system access. 2-6 Dell OptiPlex GXa and OptiPlex NX Systems Service Manual