Blinking a red light commonly shows when there is an internal problem occurring in your PC. Maybe the power supply is not working properly and is unable to supply the appropriate power. Also, any other hardware problem may exist because this light is also a symbol of hardware failure. As this is a hardware problem most of us don’t know How to fix Blinking Red light on PC case and take our system to the market for a solution to this problem and they charge us a heavy amount In exchange for fixing our computer.

No one will tell you how to fix this problem at home but I myself have faced this trouble, therefore, I thought to provide the solution to everyone. However, one should try firstly at home to save time and to beware of a lot of humiliation. I have experienced many things which could be the reasons for that problem. If you are facing the same problem then you are at the right place at the right time because the solution is just here for you. You only need to follow the simple steps to make everything as like before.

What does the presence of red light on the PC case indicate?

  • Improper ventilation is the main reason most of the time.
  • Sometimes it indicates the fan for the processor on the heatsink is not properly working.
  • Maybe the processor is damaged or not fixed accurately.
  • Maybe one of the RAMs of your PC is damaged or not plugged in fitly.
  • The hard drive may be not appropriately attached to the system.
  • The internal cooling system can also be a reason if it does not keep the PC cold.

Methods for fixing Blinking Red light on PC case

You need to make sure that the power supply is supplying the power properly to other components. If you have experience opening a PC and removing all its components then you can do it obviously but if you don’t have any experience before, so implement these experiments carefully. An orange light on motherboard also indicates these same problems. Before starting, I advice you to remove motherboard to avoid new damages to peripherals.

Open your PC and clean the RAMs

First of all, you need to open the PC case and eject the RAMs carefully. Most of the time this problem occurs just because of RAMs but don’t you need to get worried. Clean the RAM’s golden pins softly with the rubber and plugin to check whether it works or not. If nothing happens, so you need to take the RAM’s pin side by side on the floor. If you are facing the RAM problem then it will be solved by doing this and if any problem occurs then follow the other remaining steps.

Check the connection of the cables

In this step, you need to look at the system busses and other connections whether they are connected properly or not. Now eject the connection of the hard drive from both sides and make sure the cables are not damaged. You need to check again by plugging in all the cables and connections. Also, take an eye on other connections if wires or damaged or melted. Also you need to check the front panel connector’s connection. If everything is fine and the problem is not solved then you should move to further process if you don’t want to go to market.

Check the CPU fan is working fine

Now, these steps are for those persons who can open and remove PC parts on their own. Now make sure that your CPU fan is running properly. If it slows down then that would be the reason since the processor needs to keep cool. Look on the motherboard if the fan’s connection is weak or if it needs to eject and admit again to work properly. Also, look at the other internal fans of the computer as they can also cause heat inside the PC. The red light on the PC case sometimes indicates internal heat.

Replace the thermal paste if it heats

If fans are okay and the problem still exists and the systems are generating heat, then you need to do this step otherwise leave this step and move to the last one. In the system, the main fan on the motherboard is attached to the heatsink, and trying to reduce the temperature of the processor should be removed. After removing the fans and heatsink there will be a processor in front, it needs to be ejected too and after cleaning apply the newer thermal paste on it. Then fix everything again as it was before.

Note: If you have dual processor motherboard, you will have to repeat the same process for 2nd too.

Clean the ADPs of the motherboard

The last and the most important step which no one tells about is the process of cleaning motherboard’s ADPs. ADPs are small black chips on the motherboard which transfer data. Sometimes, if your computer is inside the table or is a closed place then it may lack ventilation. In this regard, carbon takes place on the small wires of ADPs. You only need to clean that carbon by spraying a common body spray or perfume and by using a toothbrush to remove carbon. It must work and your PC might work properly.


The red light on the motherboard shows the hardware of pc components is not appropriately connected to the system. Mostly it happens when we don’t use our PC for a few days or when we make changes to components or when we clean our system by removing its parts. If nothing is rotten on the motherboard, it can be repaired.  Follow these simple steps and try to solve your difficulty at home. Before everything disconnect your main power and open the PC case carefully in order to get rid of a hurdle.

Now remove RAMs and clean their golden pin connectors with an eraser or place your RAMs pins on the floor surface for a few seconds from both sides. Make sure the other connections of your internal system are right. Consider the cooling fan’s speed if not working properly then insert the pins correctly. If there is heat inside, then you need to replace the thermal paste. If the problem still exists then a clean motherboard especially ADPs with impure alcoholic liquids may also become a hurdle in the transformation of data.

Frequently Asked Questions

What does a blinking red light on a PC case indicate?

A blinking red light on a PC case typically indicates a power supply problem or malfunction.

How can I check if the power supply is the cause of the blinking red light?

You can check if the power supply is the cause of the blinking red light by unplugging all cables and components from the PC, except for the power cable and monitor, and then turning the PC on. If the red light continues to blink, then the power supply is likely the issue.

What should I do if the power supply is the cause of the blinking red light?

If the power supply is the cause of the blinking red light, you should replace it with a new one that is compatible with your PC.

Can a bad graphics card cause a blinking red light on a PC case?

Yes, a bad graphics card can cause a blinking red light on a PC case, especially if the card is not functioning properly or is not properly seated in the PCIe slot.

How can I troubleshoot other causes of a blinking red light on a PC case?

Other causes of a blinking red light on a PC case can be difficult to troubleshoot, but you can try the following steps:

  • Reseat all cables and components, including the graphics card, memory, and storage devices
  • Remove any newly added components or peripherals and see if the red light stops blinking
  • Try booting the PC with minimal components, such as just the power supply, motherboard, CPU, and memory

If these steps do not resolve the issue, it may be best to seek the assistance of a professional technician.

Abdullah Sarfraz
Myself Abdullah Sarfraz and I am an SEO. My hobby is reviewing the latest tech-related products. For the past few years, I am working on amazon affiliated sites therefore, I came to know my interest and chose this field, now I have good experience in it.