Dell OptiPlex 745c Quick Reference Guide - Page 27
Beep Codes, If your computer beeps during start-up
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Light Pattern Problem Description Suggested Resolution Memory modules are detected, but a memory configuration or compatibility error exists. • Ensure that no special memory module/memory connector placement requirements exist. • Verify that the memory modules that you are installing are compatible with your computer. • If the problem persists, contact Dell. For information on contacting Dell, see your online User's Guide. A failure has occurred. This pattern also displays when you enter system setup and may not indicate a problem. • Ensure that the cables are properly connected to the system board from the hard drive, CD drive, and DVD drive. • Check the computer message that appears on your monitor screen. • If the problem persists, contact Dell. For information on contacting Dell, see your online User's Guide. Beep Codes Your computer might emit a series of beeps during start-up if the monitor cannot display errors or problems. 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 tells you that the computer encountered a memory problem. If your computer beeps during start-up: 1 Write down the beep code. 2 See "Dell Diagnostics" on page 21 to identify a more serious cause. 3 Contact Dell for technical assistance. For information on contacting Dell, see your online User's Guide. Code 1-1-2 1-1-3 1-1-4 1-2-1 1-2-2 1-2-3 1-3 Cause Microprocessor register failure NVRAM read/write failure ROM BIOS checksum failure Programmable interval timer failure DMA initialization failure DMA page register read/write failure Video Memory test failure Code 3-1-4 3-2-2 3-2-4 3-3-1 3-3-2 3-3-4 3-4-1 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 Quick Reference Guide 27