Dell OptiPlex 745 - Manual (Page 53)

Quick Reference Guide
53
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.
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.
Code Cause Code Cause
1-1-2 Microprocessor register failure 3-1-4 Slave interrupt mask register failure
1-1-3 NVRAM read/write failure 3-2-2 Interrupt vector loading failure
1-1-4 ROM BIOS checksum failure 3-2-4 Keyboard Controller test failure
1-2-1 Programmable interval timer failure 3-3-1 NVRAM power loss
1-2-2 DMA initialization failure 3-3-2 Invalid NVRAM configuration
1-2-3 DMA page register read/write
failure 3-3-4 Video Memory test failure
1-3 Video Memory test failure 3-4-1 Screen initialization failure
1-3-1 through 2-4-4 Memory not being properly
identified or used
3-4-2 Screen retrace failure
3-1-1 Slave DMA register failure 3-4-3 Search for video ROM failure
3-1-2 Master DMA register failure 4-2-1 No timer tick
3-1-3 Master interrupt mask register
failure 4-2-2 Shutdown failure
4-2-3 Gate A20 failure 4-4-1 Serial or parallel port test failure
4-2-4 Unexpected interrupt in protected
mode 4-4-2 Failure to decompress code to
shadowed memory
4-3-1 Memory failure above address
0FFFFh 4-4-3 Math-coprocessor test failure
4-3-3 Timer-chip counter 2 failure 4-4-4 Cache test failure
4-3-4 Time-of-day clock stopped