Look for signs of power
Check for lights, fan movement, beeps and any image before deciding that the computer is completely off. Power without a display, startup failure and no power are separate paths. Record blinking-light patterns exactly and consult the manufacturer's documentation for the model.
Check external connections
Confirm that the outlet works and the power cable or adapter is securely connected. Disconnect unnecessary peripherals. On a desktop, check accessible external switches without opening the power supply. On a laptop, inspect the charger and port externally. Stop if you find damage, a burning smell or battery swelling.
Use the correct model procedure
A power reset, diagnostic test or removable-battery check should follow the manufacturer's instructions. Procedures vary and many batteries are internal. If available, test with a known compatible adapter. Avoid random firmware resets or repeatedly reconnecting damaged equipment; those actions can complicate diagnosis.
If power returns but the screen stays blank
Move to display or startup troubleshooting rather than repeating the power check. Share the model, indicator behavior and recent changes with support. Important files on the drive may still be present even when the computer cannot start, so discuss data access before agreeing to any disk replacement or reset.
For device-specific or current product instructions, see Dell: power troubleshooting.
Need help with your own device?
Describe the problem with the model, symptoms and checks already tried. For related help, explore computer service or remote support.
