Fix a PC Which Won't Boot

Troubleshooting boot issues on a PC can be difficult, because there are so many factors at play, both software and hardware.

Determining where to start with a quick diagnosis will help save you a lot of time repairing the problem.

Firstly you need to diagnose the problem:
Try to turn on the computer. The first step to determine what you'll need to do is to try to turn the computer on.

Fixing a PC that won't start
1. Check the power cable. It may seem simple, but double-check that the power cable is plugged in and the outlet is working.

Plug the computer directly into the wall to see if your surge protector or power strip is the cause of the problem.

If you are using a laptop, make sure that the power adapter is securely connected.

2. Remove your laptop's battery and connect the power adapter. You can run your laptop without a battery inserted as long as you are plugged into a power source. I
f your laptop turns on when the battery is removed, something is wrong with the battery and you should contact the manufacturer for a replacement.

3. Try a different monitor. If your computer is starting up but you can't see anything, there could be something wrong with your monitor. Double-check the monitor's connection, and try plugging in a different monitor if possible.

4. Open the computer. In order to check the connections inside and to test the power supply, you'll need to open the case.

5. Check your power supply cables. Ensure that the cables that connect your power supply (the box that your power cable is attached to) to your motherboard are securely connected.

6. Test your power supply. Old power supplies have a tendency to fail, but testing them is a relatively straightforward process. Power supplies are the most common cause for problems with a computer's boot sequence.

7. Replace your power supply. If your power supply doesn't work after testing it, you'll probably need to replace it in order to get your computer working again.

8. Check for loose screws. If a screw has come loose in your case, it could be causing your motherboard to short out. Gently rock your case back and forth and listen for metal rattling. Either use your fingers or a long pair of tweezers to remove the screw from the case.