28 Quick Reference Guidew w w . d e l l . c o m | s u p p o r t . d e l l . c o mBeep CodesYour computer might emit a series of beeps during start-up if the monitor cannot display errors orproblems. This series of beeps, called a beep code, identifies a problem. One possible beep code(code 1-3-1) consists of one beep, a burst of three beeps, and then one beep. This beep code tellsyou that the computer encountered a memory problem.If your computer beeps during start-up:1 Write down the beep code on the Diagnostic Checklist (see your User’s Guide).2 Run the Dell Diagnostics to identify a more serious cause.3 Contact Dell for technical assistance.Code Cause Code Cause1-1-2 Microprocessor register failure 3-3-4 Video Memory Test failure1-1-3 NVRAM read/write failure 3-4-1 Screen initialization failure1-1-4 ROM BIOS checksum failure 3-4-2 Screen retrace failure1-2-1 Programmable interval timer failure 3-4-3 Search for video ROM failure1-2-2 DMA initialization failure 4-2-1 No timer tick1-2-3 DMA page register read/write failure 4-2-2 Shutdown failure1-3 Video Memory Test failure 4-2-3 Gate A20 failure1-3-1through2-4-4Memory not being properly identifiedor used4-2-4 Unexpected interrupt in protectedmode3-1-1 Slave DMA register failure 4-3-1 Memory failure above address0FFFFh3-1-2 Master DMA register failure 4-3-3 Timer-chip counter 2 failure3-1-3 Master interrupt mask register failure 4-3-4 Time-of-day clock stopped3-1-4 Slave interrupt mask register failure 4-4-1 Serial or parallel port test failure3-2-2 Interrupt vector loading failure 4-4-2 Failure to decompress code toshadowed memory3-2-4 Keyboard Controller Test failure 4-4-3 Math-coprocessor test failure3-3-1 NVRAM power loss 4-4-4 Cache test failure3-3-2 Invalid NVRAM configuration 4-3-4 Time-of-day clock stopped