Computer Random Restart Solution

If you have a regular desktop PC and you notice that while using the computer ii keeps shutting down it could be one or more problems. In this article we will look at two of the most common components in your desktop computer that if gone bad, can trigger a hard shutdown of your computer system.

The Power Supply
This is on of the most common components which when malfunctions, can cause your system to do a hard shutdown. The power supply in your computer provides power for various components in the system. It powers the motherboard, which distributes power to components attached to it directly such as CPU, memory and external peripherals. The Power supply also powers your hard disk, optical drive, USB ports and any other internal Peripherals. The power supply intakes 120Volts of electricity and Outputs various voltages as required by different components of the computers system. The motherboard requires a input voltage of 12Volts to power all attached components and to keep the system powered on. The hard drive and optical drive uses 5volts to keep powered. If the power supply goes bad and the voltage output drops intermittently, it can cause your computer to shut down and restart randomly.

Central Processing Unit
CPU is the brain of the computer, it is in charge of handling calculations whether it be major or minor on your system. Because of the clock cycle on CPU's, they tend to heat up quickly and needs a piece of hardware called the heat sink and fan to keep the CPU running at optimum temperature. The heat is transferred from the CPU to the metal heat-sink and dissipate using the fan which is attached to the heat sink. If the fan on the heat-sink malfunctions it can cause the CPU temperature to rise and burn up. Many computers today have a fail safe mechanism where if the CPU's temperature rises above normal, it may trigger a shut down or continuous restart of the computer system.

Power supply Unit

How Check The CPU Temperature

  1. When the CPU overheats,  you might hear the internal fans working faster than usual and a bit more noisier.What is happening is that the computer will try to cool itself down. Just like any human would do if their body gets too hot. It does this by venting higher temperatures via the heat sink (a naturally-heat conductive component typically made of aluminum) and the accompanying fans which direct CPU heat through the case.
  2. For the CPU, you will have to make a few checks to verify if your CPU is overheating. The first step is to boot your computer into BIOS settings and view your CPU temperature. For the new line of Pentium processors, you can use the table below as a guide to see if your CPU is overheating:Processors. Processors Average temperature: Intel Core i3 50°C - 60°C Intel Core i5 50°C - 62°C Intel Core i7 50°C - 65°C Intel Pentium II 65°C - 75°C.Any temperature you notice above the norm would mean your CPU is just too hot.
  3. Open the computer and look if all the fans are spinning in the system especially the one fan which keeps the CPU cool. That fan should either be on top of the heat sink or at the front of the computer pulling away hot air from the heat sink and processor. The CPU fan is always near the CPU.
If the CPU is overheating, and the fan is operable, you may have to replace that CPU. But before you run off and go buy an expensive CPU, you must now check to ensure that your Power Supply is in good working condition, that is it is supplying the correct voltage to the system and the PSU fan is also working.

Heat Sink

How To Check The Power Supply Unit (PSU)

To check that your computer is getting the correct voltage from the PSU, you may need a voltmeter to check the correct input voltages coming through the various connectors on the PSU.: Here is the what you will need to do to test the power supply.
  1. Plug the power supply into the wall.
  2. Find the big 24 pin connector that connects to the motherboard.
  3. Connect the GREEN wire with the adjacent BLACK wire.
  4. The power supply's fan should start up. If it doesn't then it's dead.
  5. Use your volt meter to test four pin connectors (should register 5 volts)
  6. Use your volt meter to test the 24 pin connector(should register 12 volts)

    Any reading you get above or below may signal that you will definitely need to seek out a new power supply unit.

Other Things May Also Cause Your Computer To Randomly Restart 

1. System Issues

  • You may be working with a corrupt windows installation. Run a SFC.exe /scannow command to fix this issue. Make sure you have the operating system installation disk ready, you may be prompted to insert this disk as the system looks to repair itself by copying good files from the cd.

2. Bad Programs of Drivers

  • I have seen this way too often where a new driver for a particular piece of device is installed on the system and it goes completely haywire.To resolve this you may need to uninstall that bad driver or program by booting into safe mode and uninstalling the program or driver:

How To Boot your computer into safe mode:
Windows 10 - Restart and hold down Shift +F8
Windows 7 - Restart and press F8
Windows 8.1  - Restart and Pres Shift+F8
Windows XP  - Restart and press F8

3. Memory Issues

 Random Access Memory is the primary memory in your computer. When RAM begins to fail, you will see your system slowly disintegrating because of lack of or faulty memory. You will notice frequent lock ups of application, a low moving PC and many times a system restart.

Test The RAM
Run the windows memory diagnostic tool come built in windows. You can access this by doing the following:
  • Open Start menu search and type windows memory diagnostic, and hit Enter key
  • A Windows Memory Diagnostic (WMD) screen would appear, stating a couple of options.
  • Examine your computer for memory problems, by Restarting immediately or on Next restart
  • On a restart, WMD will carry out a scan, aiming to detect and resolve memory issues.
If the memory diagnostics return good results, open the compute and remove the RAM from its original slot and utilize a free RAM slot on the computer. Re-seating memory in a new slot or current slot is a simple task but many times solves big problems.

4. Virus/Malware

You must never forget to always scan for viruses which may interact with your system negatively. Ensure that your virus definitions are updated regularly and run a thorough scan of the computer for viruses and if found remove them. Ensure that you keep good quality backups in case of data loss.