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Follow the on-screen prompts and respond appropriately to complete the diagnostics.Use the arrow keys to select Diagnostics and press the Enter key.At the Dell logo, tap the F12 key until One-time Boot Menu appears.Running Dell Pre-boot System Assessment or enhanced Pre-boot System Assessment (Dell PSA or ePSA) If your computer cannot boot into Windows or does not have an active Internet connection, follow these steps to run a diagnostic test. If your computer can boot into Windows and has an active Internet connection, run a hardware diagnostic test on the sound or audio card using Dell SupportAssist. Running hardware diagnostic test using Dell SupportAssist The Dell ePSA hardware diagnostic test checks if the hardware devices are working correctly. Dell offers both integrated and online diagnostics. To determine if your Dell computer is experiencing a hardware problem, it is recommended that you first run a hardware diagnostic test on your computer. Running a hardware diagnostic test can help you identify hardware-related problems and provide you with troubleshooting steps to help resolve the issue. If the issue persists, go to the next step. Under Hardware and Sound, click Troubleshoot audio recording.Under System and Security, click Find and fix problems.
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