Dell OptiPlex 745 Quick Reference Guide - Page 53

book.book Page 53 Wednesday, August 16, 2006 3:18 PM If your computer beeps during start-up: 1 Write down the beep code. 2 See "Dell Diagnostics" on page 46 to identify a more serious cause. 3 Contact Dell for technical assistance. For information on contacting Dell, see your online User's Guide. Code Cause Code 1-1-2 Microprocessor register failure 3-1-4 1-1-3 NVRAM read/write failure 3-2-2 1-1-4 ROM BIOS checksum failure 3-2-4 1-2-1 Programmable interval timer failure 3-3-1 1-2-2 DMA initialization failure 3-3-2 1-2-3 DMA page register read/write failure 3-3-4 1-3 Video Memory test failure 3-4-1 1-3-1 through 2-4-4 Memory not being properly identified or used 3-4-2 3-1-1 Slave DMA register failure 3-4-3 3-1-2 Master DMA register failure 4-2-1 3-1-3 Master interrupt mask register failure 4-2-2 4-2-3 Gate A20 failure 4-4-1 4-2-4 Unexpected interrupt in protected 4-4-2 mode 4-3-1 Memory failure above address 0FFFFh 4-4-3 4-3-3 Timer-chip counter 2 failure 4-4-4 4-3-4 Time-of-day clock stopped Cause Slave interrupt mask register failure Interrupt vector loading failure Keyboard Controller test failure NVRAM power loss Invalid NVRAM configuration Video Memory test failure Screen initialization failure 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. Quick Reference Guide 53