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PC Off and Won't Turn On? Here are 5 Possible Causes!

The first time assembling a PC is a thrilling experience! Sometimes there are just silly things but after that it can be a lesson afterwards.

One example of this experience is like a dead PC that won’t turn on, the PC turns on but there are errors and so on.

So anticipating this, we will discuss what causes the PC to die and won’t turn on when you first assemble the PC? There are various causes and what we will discuss are the common ones that often occur.

What are some of the common causes that make a PC turn off and won’t turn on? Come on check!

1. Incorrectly Installed the Motherboard Panel Cable

Panel cable between motherboard and PSU (Power Supply Unit) is a very important part. Apart from being important, for beginners some slots PSU cables seem complicated.

A good PSU usually has markings on each cable panel what are the functions of these cables. In addition, beginners can also read the user manual for installation motherboard which is usually already available with the sale motherboard.

Wrongly plugged the cable into slots it will make motherboard not alive. Worse yet, if the installation of the cable causes a short circuit and will damage it motherboard.

Therefore, reading the user manual is the most important thing in installing motherboard.

2. RAM is not plugged strong

This is a frequent error. PC won’t turn on or at least it won’t turn on boot to the operating system. RAM memory that is not plugged in properly, will cause an error when the PC is about to run boot.

Even worse, RAM memory that is not plugged in strongly can cause a short or short circuit and cause the PC to not turn on. Therefore, make sure the RAM is firmly plugged in.

3. Wrong PSU Cable on Motherboard

Source: Emo Images

Installing the wrong PSU cable, is also often the cause of why the PC turns off and won’t turn on. Usually this happens when there is an error in the PSU cable type installation.

Usually people forget to plug the cable with the 24-ATX pin into the motherboard. Always check whether the cable is plugged in properly and correctly. Sometimes there are too motherboard which uses a cable with 20-ATX pins.

If the cable doesn’t match, you can use converter which are usually sold in various computer accessories stores. Or maybe replace it with a new suitable PSU.

4. Forgot to Install the Motherboard Scratch

Source: Wikipedia

Well this is most often done by beginners. Motherboards to install in case PC, requires a nut that has a hole or commonly called a wedge motherboard.

This nut is installed in the case commonly installed motherboard. After the nut is installed, then you install it motherboard to case PC.

What causes the PC won’t turn on? This is due to the existence of a short circuit between the circuits in the motherboard to case PCs are usually made of materials that are conductors.

Therefore, the position of the wedge motherboard this is very important.

5. Processor “Fire”

An overheating processor can also be a common cause why a PC won’t turn on. Maybe you forgot to give thermal paste on the processor before installing the fan.

The state of the processor temperature must be kept stable so that changes to hot and cold do not occur so quickly. This will affect the performance and durability of the processor.


So those are some of the common reasons why a PC won’t turn on. Which one do you think you have experienced? Let’s try share!