How to fix a PC that does not boot anymore?

Before attempting any repairs, it is important to identify the source of the malfunction of your PC.
If you think this is more than just a breakdown, seek the advice of a computer expert.

Check the operation of your charger and battery


The battery and charger are often the elements that we suspect.

So the first thing to do would be to remove your battery and plug your computer into AC power.

If in this case your computer is running then your battery is probably causing this problem. You will have to replace it.

For this, we recommend that you go to the manufacturer’s official website, or ask a technician for advice.

Also check the status of the power connector. Indeed, frequent movements with the charger can damage its ends.

The protective sheath can be stripped and reveal the son located inside thereof, it means that it no longer maintains them.

This can cause an electrical problem and therefore damage the motherboard .

Fixed computers

If your computer suddenly shuts down or does not start while the LED is on, the On button may not work. The verification is done on the motherboard, to avoid aggravating the state of your PC, it is better to refer to an expert.

Check the operation of your screen


If you think your failure is coming from the screen, first disconnect any external display, such as a projector, connected to your computer.

If the LED on the display is on, the hard drive or fan is noisy and no image is visible, then try turning off all surrounding lights, and see if there is a bright veil on your screen.

If this is the case, then it is likely that the LCD inverter (component that powers the screens in brightness) of your screen does not work properly.

The brightness is reduced and the screen can be completely black.

You can replace it, but it is a very delicate operation.

Also, if it is a fairly old laptop, it may be better to buy a new one.

To help you make the right choice, take a look at our two notebook shopping guides: Cheap Laptops 2018  and Best Laptops 2018 .

Fixed computers

There is not much you can do to repair the screen of a desktop PC.

It would be best to replace it or replace the video cable.

Eject USB keys or all removable memory

USB sticks or any removable memory device left connected, or CD / DVD inserted in your computer are also to be considered.

In most cases, an error message such as “Operating system not found ” appears on the screen. This means that the BIOS tries to reboot from the removable disks instead of the internal hard disk.

Use a recovery disc

If you have error messages and the problem does not appear to come from removable cards or disks or external disks, then you should consider using a recovery disk.

If you have your Windows Recovery DVD, use it.

Alternatively, you can download (from another computer running the same system) a recovery image and burn it to a CD or DVD, or copy it to a USB flash drive.

You will then be able to start your computer with this DVD or USB key, and correct this malfunction with Windows.

If a virus is the cause of this ignition problem. You can copy the ISO image of the antivirus to a USB stick and then launch the antivirus on your computer from it. This way, you will be able to scan your computer and delete all malware, without having to connect to the network.

Start in safe mode

If you can not start your Windows: try safe mode.

With Safe Mode, you can undo all your recent changes, such as adding / removing programs or repairing / deleting one of your Windows accounts (if you have multiple) with a virus. These recent changes could prevent your PC from starting normally

If you opt for this solution, be aware that you will need a Windows Recovery CD / DVD.

For a Windows system prior to version 8, you must press the F8 key when you start your computer. Then, select the safe mode .

If you are offered a repair option when running safe mode, run it.

For PCs running Windows 8 or 10, follow these 4 steps:

  • From the Start menu, go to Settings . At the bottom right, click Update and Security .
  • In the list on the left, select Recovery .
  • Under Advanced Startup , click Restart Now .
  • When you restart your computer, 3 options will appear.
  • Select Troubleshooting .

Then 2 options are available: choose Advanced Options . Then, choose Settings , finally Enable safe mode.

If this technique does not work, our detailed tutorial  may be able to help you.

Incompatible or faulty hardware

If you had RAM or some other component installed, the cause of the crash might be there.

To be sure, uninstall them, and reinstall what was removed.

Then, restart your computer.

Also, we advise you to remove all the unnecessary hardwares when starting your PC: hard disk, optical disk burner, or any other such components.

You must keep only the bare minimum needed to start the BIOS.

Here is a list:

  • The motherboard
  • The processor (with its radiator)
  • The graphics card
  • The original RAM bar (remove recently added ones)
  • The power plug
  • The screen (monitor)

Note that sometimes, if a PC does not start is that components are incorrectly connected to the motherboard, and / or the hardware is faulty.

Also, if you hear a click that does not make sense, hear the hard drive turn (which is normally silent), or if your computer suddenly stops without stopping, then there is no doubt, he is indeed damaged.

If you think that a thorough check or repair is necessary, then it is best to seek the assistance of a computer technician.

Our main tip would be to regularly back up your most important documents to an external hard drive.

Prevention is better than cure!