Diagnostics - Dell XPS 8920 Service Manual
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Also See for XPS 8920:
- Service manual (102 pages) ,
- Setup and specifications (22 pages) ,
- Setup and specifications (19 pages)
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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 9. Diagnostics
Number of LED flashes
1
2
3
4
5
6
7
3,6
3,7
128
Problem description
System board: BIOS and ROM failure
No memory or RAM detected
System board or chipset error
Memory or RAM failure
CMOS battery failure
Video card or chip failure
CPU failure
Recovery image not found
Recovery image found but invalid
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