1. See what your computer is doing when you try to start it.
Does your computer not turn on at all? Does it make a sound when you try to start it? Do you see any lights that blink or come on when you try to start the computer? Do you see any lights that come on when the AC adapter is connected? Does the blue screen or error message appear when you try to start it? If so, what is the error message?
2. Check your power source to the computer.
In the event that your computer does not turn on completely, the culprit is most likely the power supply (desktop only) or the motherboard. Make sure the connectors are properly connected and the switch on the back of the power supply is on.
3. Try the monitor or monitor.
If you hear the computer is on but nothing appears on the screen, make sure the monitor is connected properly. Try changing the monitor or connecting an external monitor to a laptop. You can also remove the bottom panel from your laptop and make sure the monitor cable is properly connected to the system board.
Note: Opening the bottom panel of a laptop may void the warranty. If your laptop is still under warranty, contact the manufacturer or place of purchase and find out what to do to repair your computer.
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4. Test the battery of the computer.
If you have a laptop with a removable battery, take the battery to a battery depot and have them test it. They can tell you if the battery is still working and what its capacity is. If your laptop doesn’t have a removable battery, you can remove the bottom of your computer and remove the internal battery.
5. Resets the random access memory (RAM).
Try to gently remove the RAM and turn on the computer. When most computers are working properly, they emit a long, repeating “memory error” beep. Shut down the computer and replace the RAM, one key at a time. Turn on the computer when the RAM is properly installed.
6. Test the video card.
If your computer has a removable graphics card, try removing and replacing it, or connect the monitor to the integrated video port, if available.
7. Google error message.
If you see a blue screen or error message when you turn on your computer, look up the error message and the number and model of your computer using another device. You will probably find the cause of the error message and what you need to do to correct it.
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8. Try starting in safe mode.
If you can start in safe mode, the problem is probably a software problem. Start in safe mode by holding down the Shift key while your computer boots into Mac. [5] On some Windows computers, it is possible to hold down the Shift and F8 keys while the computer begins to enter safe mode. However, this is not possible if your computer has a fast boot or an SSD drive. Follow the steps below to get started in Windows Safe Mode:
- Turn on your computer.
- Press and hold the power button for 10 seconds when you see your computer logo or Windows logo to interrupt the startup process and force your computer to shut down.
- Repeat the startup and shutdown / shutdown process three times.
- Select your Windows username if prompted.
- Select Advanced Settings.
- Select Troubleshooting.
- Select Advanced Settings.
- Select Startup Settings.
- Select Restart.
- Press 5 or F5 to start in Safe Mode with Networking.
9. If possible, make a backup copy of your data.
If you can start in safe mode, take the opportunity to back up as many important files and data as possible. You can back up your files to an external hard drive or a USB stick. If you can start in safe mode with networks, you can back up your data to a cloud storage service (for example, iCloud, DropBox, or Google Drive).
10. Reinstall your operating system.
If you can boot into Safe Mode, the problem is most likely a software issue. You may need to reinstall your operating system. Follow these steps to reinstall your operating system in Safe Mode:
The Windows:
- Click the Windows Start menu icon.
- Click the settings or nut icon.
- Click Update & Security.
- Click on Recovery in the left panel.
- Click Get started under “Reset this PC”.
- Click Keep my files or Remove all.
- Click on Next.
- Follow the instructions and click on Reset.
Mac:
- Make sure the Time Machine disk drive is connected.
- Restart your Mac and hold down the Command and R keys while your Mac starts up.
- Select your language and click on the arrow icon.
- Click Reinstall macOS. (To remove your hard drive, click Disk Utility and select your hard drive. Then click Remove).
- Enter your username and password if required.
- Click on Continue.
11. Replace or repair your computer.
If you’ve tried everything and your computer can’t turn on or boot, you may need to have it repaired or replaced. If your computer is older, it may be cheaper to buy a new one instead of having it fixed. Otherwise, you can take it to a local computer repair shop. If your computer is still under warranty, contact the manufacturer or the point of purchase to find out what to do to repair or replace it.
