1. Black Screen
When we turn on the computer, the most common issue we can face is to see a black screen. You should consider whether it is due to a screen failure or other malfunction. On a desktop computer, you can unplug the display cable and plug it in again. You can connect it to an external monitor or TV. If it works normally, search for another reason. If you hear the computer working, the start-up sounds, or you see the hard-drive lights on, your screen is most likely to be damaged.
If you turn a flash light on the screen in a dark place and you are able to see the lettering, the Inventer or the backlight might be burned. Other reasons that may be causing your computer's black screen are driver malfunctions. If the driver hass failed and you have an old computer, consider whether it is worth repairing. The cost will be low if a cable or capacitor has been burned.
If the screen view is operating when it is connected to another monitor, a memory module or the processor may be burned. Finally it could be due to failure of the graphic's card.
2. Distorted Screen Image
When your computer screen is working but has deformations in the image or colors, the failure may be due to the graphics card or Drivers. The chances of being due to the cable are much less.
3. The Computer at Startup Repeats Continuously (Bootloop)
In this case, the computer has detected a significant error and tries to fix it. After a few restarts, the damage can be repaired by itself. If the damage is not fixed, it may be due to the operating disk or other device such as dvd / cd rom. You can try to boot in safe mode, or check the disk through an application.
4. The Computer Reboots Suddenly while the Computer was Running Normally.
Here are 3 possible causes. Problem in the operating, virus or problem while charging. If you have windows and it's a virus, download a good Antivirus program to protect your computer.
If your computer operates with windows you may have a problem with the Software or hardware. Another potential problem may be the power supply of the computer or if you have generally noticed sudden changes in current voltage of your space. In the second case, it is advisable to purchase a UPS.
5. Your Computer Shuts Down
The processor increases the temperature during computer operation. For this reason there is at least one heatsink and fan. If this system for some reason does not work properly, then the computer turns off for security. Your computer may have caught dust inside and need cleaning or may need some conductive paste to make better contact. Another cause may be the power cable, plug or voltage that passes on the computer. Temperature and voltage can be controlled by BIOS and for more certain voltage effects, try a multimeter.
