![]() ![]() Use the arrow keys to select Diagnostics and press the Enter key.When the Dell logo appears, press the F12 key to enter the One-time Boot Menu.Running Dell SupportAssist Pre-boot System Assessment or enhanced Pre-boot System Assessment (Dell PSA or ePSA) If the computer can boot into Windows and has an active Internet connection, run a USB test on the Dell computer using Dell SupportAssist. Running a hardware diagnostic test using Dell SupportAssist 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. Running a hardware diagnostic test can help you identify hardware-related problems and provide you with troubleshooting steps to help resolve the issue.
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