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Troubleshooting
The following section describes common troubleshooting steps that can be performed to resolve certain
problems on your computer.
Enhanced Pre-Boot System Assessment (ePSA)
diagnostics
The ePSA diagnostics (also known as system diagnostics) performs a complete check of your hardware.
The ePSA is embedded with the BIOS and is launched by the BIOS internally. The embedded system
diagnostics provides a set of options for particular devices or device groups allowing you to:
•
Run tests automatically or in an interactive mode
•
Repeat tests
•
Display or save test results
•
Run thorough tests to introduce additional test options to provide extra information about the failed
device(s)
•
View status messages that inform you if tests are completed successfully
•
View error messages that inform you of problems encountered during testing
CAUTION: Use the system diagnostics to test only your computer. Using this program with other
computers may cause invalid results or error messages.
NOTE: Some tests for specific devices require user interaction. Always ensure that you are present
at the computer terminal when the diagnostic tests are performed.
LED error codes
Table 9. LED error codes
LED
Fault description
flashes
1,1
Bad system board
1,2
Bad system board, PSU or cabling
1.3
Bad system board, DIMMS or CPU
1,4
Bad coin cell battery
2,1
CPU problem
2,2
System board: BIOS ROM failure
2,3
Memory issue
82
8
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