Fixing Computer That Turns ON, but Shows Nothing on The Display
Sometimes it’s possible that when you Turn ON your computer but the display remains still and shows nothing, and the main reason behind your monitor’s showing “No Signal” or “Check Video Cable” error on the screen is all because of some minor or maybe a major fault in your computer’s Hardware.
There are numbers of possible things which can happen to your PC, and the best & fast way to find the actual problem is to troubleshoot your PC properly. So, just stick with this tutorial and I’ll guide you the step by step hardware verification what you’ll need to do in order to start or boot up your computer.
Suggested Link: How to Fix Black Blank No Display Laptop’s Problem?
Or in case if your computer doesn’t show you any sign of electricity or remain dead, after when you push the start button. Then you should need to check out our this tutorial to know more about: How to Fix A Dead Computer Which Won’t Turn ON?
So, Let’s Start to Troubleshoot Your PC;
Solution #1 – External Cable’s Checkup
Now the first thing you’ll need to make sure about your monitor is, that it’s ‘Powered ON’ and the video cable is connected properly. Most of the times just because of some loose cable, a lot of people having this black blank display related problem.
If everything is connected properly and still nothing comes up on your computer’s screen, then the second-best way to identify it is an internal hardware problem or an external. You can try to press the NumLock or CapsLock Keyboard’s Key again and again, and check the keyboard’s NumLock or CapsLock light is blinking or not.
If it blinks after hitting the keys then it’s definitely your monitor’s cable fault, and now it’s the time where you should try to use some different Video Cable for your PC. I’m only saying this because if your keyboard is working well then it means all your internal hardware is working great and the actual problem is coming from outside the computer’s cabinet.
In case, If the cross-checking the video cable won’t works for you, then you can also try to cross-check your computer with some other working Monitor or TV too.
Solution #2 – Graphics/Video Card Checkup
External Graphics Processing Unit is usually installed on the PC’s motherboard as an additional motherboard component. The good thing about discrete graphics is that it can be easily upgraded when you are in need of modifying your computer system.
And it’s possible that after cross-checking the monitor, you still get the black blank screen or maybe the “No Signal” error just because of some minor fault in your graphics card.
So, now the second thing what you’ll need to troubleshoot in your computer is the Graphics Card. The reason why we are testing the card now is because it’s the one, who processes all the graphical process and displays graphical images to the computer user.
In case, if you don’t have any graphics card installed in your computer then you can skip this step because your computer’s graphical process is controlled by the motherboard’s Chipset Chip and we’ll do trouble the motherboard later in this article.
If you never cleaned your Graphics Card in a past year then it’s possible that the golden contacts of your card might has some corrosion on it.
And not just one reason, a lot of different GPU’s fault can happen: like GPU’s Fan isn’t working or maybe the GPU need Reballing or like something etc. So, now the time comes where you need to disassemble the card from your PC’s motherboard (just for the troubleshooting purpose). And make sure you wore the ESD Grounding Anti-Static Wrist Straps.
Suggested Link: What Is The Importance Of Anti-Static Wrist Bands?
Now you need to pick your favorite screwdriver and open your computer’s case to find the installed graphics card in it. Make sure you removed all the Peripheral Device’s Cables before starting anything, and then lay down your PC on the table and starts to unscrew the side cover screws.
After that, you’ll need to remove the card from your PC’s Cabinet which is mainly installed in PCI x16 Slot and hold by the Cabinet’s PCI Card Holder. So, just remove one more screw and you are good to go.
When you successfully removed your card from your PC then it’s the time when you need to plug your monitor’s video cable directly to the Motherboard’s Video Port (VGA/HDMI/DVI) and try to start your PC again. If your computer works after removing the card, then it possible that the card might get faulty or maybe it just needs an isopropyl alcohol Bath (because it’s dirty). Or in case, if you still get the problem then the problem is related to something else and you can troubleshoot it out by moving to next solution.
Most of the times the graphics card just only need a proper cleaning to make a proper physical connection between the motherboard to work properly. To do that, you can use a screwdriver to de-assemble the Card’s heatsink and remove all the dirt out from it by using an Air Pressure Can or a pressure blower. After that, dip the cotton bud in 99% isopropyl alcohol and starts to clean your GPU.
- How to Install Graphic Card or Video Card in Your Computer?
- How to Repair a Graphics Card by Reflow Solder?
Solution #3 – Internal Hardware Checkup
A motherboard only needs RAM, Processor, CPU Fan and an SMPS to startup itself and all the other things like HDD and DVD-RW etc. are just for the increasing experience. In case if any connect hardware get broken-down, it’s possible that the NO Display problem occurs.
There is lots of extra hardware in your computer’s cabinet which have no relation between to your motherboard’s startup i.e. Hard drive, SSD, DVD-RW, FDD, Cabinet Lights, External Card and etc. So, now it’s time to remove all those extra stuff and start your motherboard by using only those hardware which needed the most to starts it.
After that, you can try to Turn ON your computer and If it boots up normally, that means your computer is having an issue with one of the extra internal hardware parts which you need to check.
You can do it by checking every hardware parts which you disconnect one by one by connecting it back to its place and that will help you to find which one is actually creating the problem. If your display still doesn’t show you anything, then just move on to next solution.
Solution #4 – CMOS Battery Checkup
And sometimes it’s possible that your PC’s CMOS Battery got drained out and prevent your computer to starts up normally. In that case, you can remove your CMOS battery and try to start your computer again. If it starts normally, then change your motherboard’s CMOS Battery Cell and then set all the BIOS setting according to you.
Solution #5 – RAM Checkup
Most of you people will fix your problem by using this step. Commonly 90% no display fault comes just because of a faulty RAM and in case if your RAM got dead, then there is nothing other than a new RAM stick can start your PC.
In case, if you have two RAM Stick installed in your computer then you can try to remove one of them and then Turn ON your computer. If your computer still won’t work, then just remove the RAM from its slot and install another one on that same RAM Slot.
If your computer still won’t able to work out, then just do the previous steps on the other RAM slot of your motherboard. And that’s how you can easily find which one of your RAM or RAM’s Slot isn’t working properly.
You can also borrow a compatible ‘RAM Stick’ from one of your friend in case if you don’t have any working RAM stick for testing (other than your system’s RAM).
If you find your RAM faulty, then believe it or not but cleaning it can increase the chance 80% that it will work again in your computer. Here’s is the link: RAM Cleaning – One Solution To Fix Memory Related Problems, and for other 20% here’s the second link which can help too; How to Repair a Dead RAM Stick (Random Access Memory)?
Solution 6 – At last PSU/Processor/Motherboard Checkup
Now let’s get to the bad part about this tutorial because now there is 100% chance that you have some big problem with one or more of your computer’s major hardware.
And the other bad thing is, you can’t test major hardware without professional machines. So, the best thing what you can do test your PC, just use your CPU on some working motherboard (which do compatible with your Processor). If CPU works good on another computer, then just move to other major hardware parts like motherboard and PSU, and test all things out until you’ve found the faulty Hardware.
- How To Buy A Processor (CPU) For Desktop PC?
- How To Buy Perfect Power Supply Unit (PSU) For Desktop Computer?
“And that’s all for now, thanks for sticking with the article, and you know it will always good to let me know about the tutorial, in the comments down below.” 🙂