Dell OptiPlex N Diagnostics and Troubleshooting Guide (.pdf) - Page 36
Run the System Set Test Group in the Dell Diagnostics. See
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Table 2-2. System Beep Codes (continued) Code Cause Action 5-1-2 BIOS update error-no RAM in system See "Troubleshooting System Memory" in Chapter 6. 5-1-3 BIOS update error-external video card detected If a video expansion card is installed, disconnect the video expansion card and connect the monitor to the built-in video subsystem. If the problem is not resolved, see "Troubleshooting the Video Subsystem" in Chapter 6. 5-1-4 BIOS execution error Run the System Set Test Group in the Dell Diagnostics. See Chapter 4, "Running the Dell Diagnostics." 6-1-2 I/O controller failure Run the System Set Test Group in the Dell Diagnostics. See Chapter 4, "Running the Dell Diagnostics." 6-1-3 Keyboard controller failure Run the System Set Test Group in the Dell Diagnostics. See Chapter 4, "Running the Dell Diagnostics." 6-1-4 CMOS Register Test failure Run the System Set Test Group in the Dell Diagnostics. See Chapter 4, "Running the Dell Diagnostics." 6-2-1 BIOS shadowing failure Run the System Set Test Group in the Dell Diagnostics. See Chapter 4, "Running the Dell Diagnostics." 6-2-2 Pentium speed determination failure Run the System Set Test Group in the Dell Diagnostics. See Chapter 4, "Running the Dell Diagnostics." 6-2-3 No SIMM or DIMM installed See "Troubleshooting System Memory" in Chapter 6. NOTE: For the full name of an abbreviation or acronym used in this table, see the abbreviation and acronym list that precedes the Index. 2-12 Diagnostics and Troubleshooting Guide