Computer Won't Boot: Triage Guide

Symptom

The computer does not turn on, or turns on but never reaches the login screen.

Possible Causes

• A power cable or battery issue, so no power is reaching the device.
• A loose or faulty display cable: the device is on, but the screen stays blank.
• A corrupted or failed operating system startup.
• A recent Windows update or driver causing a boot loop.
• A failing hard drive or storage device.
• A peripheral device conflict preventing boot.

Step-by-step Resolution

1. Confirm the power cable is connected and the outlet or power strip is working.
2. For laptops, check whether the battery indicator light turns on when plugged in, and try a different charger if one is available.
3. Look and listen for any signs of power (fans spinning, lights on), even if the screen stays blank.
4. If the device powers on but the screen is blank, connect an external monitor to rule out a display issue.
5. Disconnect all non-essential peripherals (USB drives, external monitors, docking stations) and try booting again.
6. Attempt to boot into Safe Mode to check whether the issue is driver- or software-related.
7. If a recent update is suspected, boot into recovery options and roll back the update or driver.
8. Note any error codes, beep sequences, or on-screen messages for later diagnosis.
9. If the device boots successfully, monitor it for a few minutes to confirm it stays stable before returning it to the user.

When to Escalate

• The device shows no signs of power at all after basic checks.
• You hear repeated beep codes or see a hardware error message, such as a failed memory or failed drive warning.
• Safe Mode also fails to load.
• The symptoms suggest a failing hard drive or motherboard component that needs hardware diagnostics.

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Still stuck? Submit a ticket and reference this article. The agent will already know what steps you've tried.