Dell OptiPlex 745c Quick Reference Guide - Page 28

Code 1-3-1 through 2-4-4 3-1-1 3-1-2 3-1-3 4-2-3 4-2-4 4-3-1 4-3-3 4-3-4 Cause Memory not being properly identified or used Slave DMA register failure Master DMA register failure Master interrupt mask register failure Gate A20 failure Unexpected interrupt in protected mode Code 3-4-2 3-4-3 4-2-1 4-2-2 4-4-1 4-4-2 Memory failure above address 0FFFFh Timer-chip counter 2 failure Time-of-day clock stopped 4-4-3 4-4-4 Cause Screen retrace failure Search for video ROM failure No timer tick Shutdown failure Serial or parallel port test failure Failure to decompress code to shadowed memory Math-coprocessor test failure Cache test failure Resolving Software and Hardware Incompatibilities If a device is either not detected during the operating system setup or is detected but incorrectly configured, you can use the Hardware Troubleshooter to resolve the incompatibility. 1 Click the Start button and click Help and Support. 2 Type hardware troubleshooter in the Search field and click the arrow to start the search. 3 Click Hardware Troubleshooter in the Search Results list. 4 In the Hardware Troubleshooter list, click I need to resolve a hardware conflict on my computer, and click Next. Using Microsoft Windows XP System Restore The Microsoft Windows XP operating system provides System Restore to allow you to return your computer to an earlier operating state (without affecting data files) if changes to the hardware, software, or other system settings have left the computer in an undesirable operating state. See the Windows Help and Support Center for information on using System Restore. To access the Windows Help and Support Center, see "Windows Help and Support Center" on page 6. NOTICE: Make regular backups of your data files. System Restore does not monitor your data files or recover them. Creating a Restore Point 1 Click the Start button and click Help and Support. 2 Click System Restore. 3 Follow the instructions on the screen. 28 Quick Reference Guide