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Dell Vostro 3660/3669 Owner's Manual

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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 1. Diagnostics
Number of LED flashes Beep code Problem description
2 amber 2 No memory or RAM detected
4 amber 4 Memory or RAM failure
5 amber 5 CMOS battery failure
3 amber, 4 white 3,4 Recovery image invalid
3 amber, 3 white 3,3 Recovery image not found

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