Windows Computer Won't Turn On?

You press the power button and nothing happens. Or it lights up briefly then dies. Or the fans spin but nothing comes on the screen. Three different problems, three different fixes. Let's figure out yours.

Step 1: Identify which "won't turn on" you have

Press the power button. Watch and listen carefully:

• Absolutely nothing (no lights, no fans, no sounds): No power. Skip to Step 2.
• Lights and fans come on but no display: Booting but no video output. Skip to Step 4.
• Powers on then shuts off after a few seconds: Protection shutdown. Skip to Step 5.
• Powers on, sees Windows logo, then stuck or crashes: Boot problem. Skip to Step 6.

Step 2: No power at all (fix the basics)

Check in order:

1. Power cable firmly plugged in at both ends
2. Wall outlet works (plug in a lamp to test)
3. Power strip is on, surge protector isn't tripped
4. For desktops: power supply switch on the back of the computer (red I/O switch) is set to ON
5. For laptops: charger LED is lit. If not, charger or cable is dead.

Step 3: Drain residual power and try again

Desktop: Unplug power cable. Hold power button on the case for 30 seconds. Plug back in. Try to power on.

Laptop with non-removable battery: Unplug charger. Hold power button for 30 seconds. Plug charger back in. Try to power on.

Laptop with removable battery: Unplug charger, remove battery. Hold power button for 30 seconds. Put battery back, plug charger in. Power on.

Step 4: Powers on but no display

The computer is on but you see no picture.

1. Confirm the monitor is on and set to the right input (HDMI, DisplayPort, USB-C, etc.)
2. Try a different cable
3. Try a different monitor if you have one (or your TV with HDMI)
4. If on a desktop with both onboard graphics and a graphics card, try plugging the monitor into the other one
5. Reseat the RAM (desktops): unplug, open case, push RAM sticks down firmly into their slots

Step 5: Turns on, then shuts off in seconds

This is the computer's overheat protection or hardware failure protection kicking in.

• Dust and overheating: Take the side off the desktop case (or remove the bottom panel of a laptop). Use canned air to blow out the fans and heatsinks. Don't use a vacuum. Static electricity from vacuums can fry components.
• Loose RAM: Reseat the RAM sticks (desktops only. Laptop RAM is often soldered)
• Failing power supply (desktop): if you have a spare, swap it. Otherwise, professional diagnosis.

Step 6: Boots but Windows won't load

If you see the Windows logo or progress spinner but it never finishes loading:

1. Force a power off (hold power button 10 seconds)
2. Power back on
3. If it fails again, Windows should automatically boot into the Recovery Environment after 2-3 failed attempts
4. From there pick Troubleshoot > Advanced options > Startup Repair
5. If that fails, try Safe Mode (Troubleshoot > Advanced > Startup Settings > Restart, then press 4)

When it's hardware (and what fails)

If basic steps don't work, the most common hardware failures by age:

• Under 3 years: usually warrantied. Contact the manufacturer.
• 3-6 years: hard drive (especially HDD), RAM, or power supply
• 6+ years: motherboard capacitors, power supply, or just age

A laptop more than 7 years old with major hardware failure usually isn't worth repairing. A desktop is much easier and cheaper to fix because parts are standardized.

Video walkthrough

Video by Britec09 on YouTube