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Troubleshooting Your Computer
You can troubleshoot your computer using indicators like Diagnostic Lights, Beep Codes, and Error Messages during the
operation of the computer.
Enhanced Pre-boot System Assessment (ePSA)
The ePSA is a diagnostic utility available on your computer. This utility includes a series of tests for a computer's
hardware. You can run these tests even if the computer lacks any media (hard drive, optical drive, etc.). If a ePSA-tested
component fails, the system displays an error code and generates a beep code.
Features
• Graphical User Interface
• Automatic Default Operation- runs test on all devices, allowing a user to interrupt and select any device
• Checks the Master Boot Record for readiness to boot into a full OS environment
• Tablet panel test
• Video memory test
• Battery test
• Charger test
• Event log scan
• Multiprocessor cache test
Running the ePSA Diagnostic Utility
NOTE: The following steps can be used to run the ePSA diagnostic utility in DOS mode without using an external
keyboard.
1. Power on the system and immediately press the Volume Up key to begin the tests.
2. The computer will begin running the ePSA utility.
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