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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 <Power> + <Start> buttons simultaneously for a second.
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