Problem: Computer does not power on or shows no signs of activity.
Steps to Resolve:

1. Check the power source: Verify the power cable is connected to a working outlet and the device.
2. Inspect hardware connections: Ensure the monitor, keyboard, and other peripherals are securely connected.
3. Remove external devices: Disconnect all non-essential devices and try turning the computer on again.
4. Perform a power drain: For laptops, remove the battery, hold the power button for 30 seconds, then reconnect the battery and try again.
5. Seek professional help: If the issue persists, it may be a hardware failure that requires expert attention.