The power supply unit (PSU) is the main component that supplies power to a desktop computer. Certain Dell all-in-one computers use an external ac adapter to power the computer. If you are experiencing any of the following symptoms, the suggested quick steps might help.
- Cannot turn on the Dell desktop or all-in-one.
- None of the LEDs on the desktop or all-in-one computer respond when you press the power button.
- The power LED on the desktop or all-in-one is off.
- There is no LED or sound indication that the desktop or all-in-one is turned on.
Here are a few quick steps that you can try to resolve a power issue
Try each step and check if the power issue is resolved. If the issue is not resolved, proceed to the next step.
- Perform a hard reset.
- Turn off the computer. Press and hold the power button for 10-15 seconds.
- Disconnect the power cable from the computer.
NOTE: Dell all-in-one computers may either come with a power cable or an AC adapter. Disconnect the power cable or the AC adapter depending on the configuration of the computer.
- Disconnect all devices such as USB drives, printers, and media cards (SD/xD) except the keyboard and mouse.
- Press and hold the power button for 15-20 seconds to drain residual power.
- Connect the power cable to the computer.
- Turn on the computer.
- Connect the power cord or ac adapter to another wall outlet (bypass any surge protectors or power strips).
- Inspect the power cable and the power port on the desktop and ensure there are no damages.
- Verify that the voltage selector switch on the power supply is set to the correct voltage (110V or 220V depending on your region). To learn more, see the user manual of the Dell desktop.
NOTE: Dell all-in-one computers or ac adapters do not have a voltage selector switch.
- Run a diagnostic test on the power supply of the Dell desktop. If the test fails, contact Dell Technical Support.
If these quick steps did not resolve your issue, we have more detailed information in the additional resources. You can also search for content related to the issue using the search bar at the top of this page.
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