Dell Vostro 3668 3667 Owners Manual - Page 37

4 Troubleshooting your computer You can troubleshoot your computer using indicators like diagnostic lights, beep codes, and error messages during the operation of the computer. Diagnostics The computer POST (Power On Self Test) ensures that it meets the basic computer requirements and the hardware is working appropriately before the boot process begins. If the computer passes the POST, the computer continues to start in a normal mode. However, if the computer fails the POST, the computer emits a series of LED codes during the start-up. The system LED is integrated on the Power button. The following table shows different light patterns and what they indicate. Table 6. Diagnostics Number of LED flashes 2 amber 4 amber 5 amber 3 amber, 4 white 3 amber, 3 white Beep code 2 4 5 3,4 3,3 Diagnostic error messages Problem description No memory or RAM detected Memory or RAM failure CMOS battery failure Recovery image invalid Recovery image not found Table 7. Diagnostic error messages Error messages AUXILIARY DEVICE FAILURE BAD COMMAND OR FILE NAME CACHE DISABLED DUE TO FAILURE CD DRIVE CONTROLLER FAILURE DATA ERROR DECREASING AVAILABLE MEMORY DISK C: FAILED INITIALIZATION Description The touchpad or external mouse may be faulty. For an external mouse, check the cable connection. Enable the Pointing Device option in the System Setup program. Ensure that you have spelled the command correctly, put spaces in the proper place, and used the correct path name. The primary cache internal to the microprocessor has failed. Contact Dell The optical drive does not respond to commands from the computer. The hard drive cannot read the data. One or more memory modules may be faulty or improperly seated. Reinstall the memory modules or, if necessary, replace them. The hard drive failed initialization. Run the hard drive tests in Dell Diagnostics. Troubleshooting your computer 37