It’s irritating when this issue happens to us, you know what I’m talking about, from all the issues we face when we use our computer this one pops up, all common computer issues are visible and can be dealt with, right? But a blank screen! I mean, what would you do if you can’t even see the problem in order to solve it? Okay, enough complaining now, let’s dive in to see how we can handle such problem, we’re going to try different options step by step to see what’s causing our screen to be blank while our computer is already on.
Make sure your monitor works fine :
Okay first thing first, make sure your monitor is working properly, see if it’s plugged in and gets enough power to be turned on, check if there is any light next to the power button to really make sure it’s OK.
Replace the monitor :
Obviously, the first thing we need to check is our monitor, so replace it with another that’s working fine. If the issue persists keep reading.
Replace the power cable :
Replace the power cable to make sure your monitor gets enough electricity, who knows! Maybe a bad power cable is causing this problem.
Replace your VGA cable :
Replace this one too with another good one and see if it solves the problem.
Also, take a look at the pins on the case or the motherboard to see if has broken or bent pins.
Unplug everything :
Unplug everything except for the mouse and the keyboard and try to turn it in again, if it doesn’t work, try to connect one item at a time to see what’s causing this issue.
Does your computer beep?
Some people are lucky enough to hear a beep coming out of their computer because it usually means that the problem is in the RAM, yep! most of the time your problem is solved just by hearing a beep and replacing or reseating the RAM.
Replace your VGA card?
check your VGA card and make sure it’s well seated, try to replace it with another one that works fine to make sure that yours is not dead or bad.
Check the processor’s fan
Maybe if the processor doesn’t get enough cooling or air your computer won’t even start, so make sure it’s spinning at a good speed, if not, replace it with another one.
Unplug everything except for the power cable
Unlike the previous step where I told you to unplug everything except for the mouse and the keyboard, this time you’ll just leave the power cable alone and press the power button down for 5 seconds or so.
Also, reseat the RAM and the VGA card (I guess I’m repeating myself :D)
Did you move the computer recently?
If you moved the computer recently you might hit it against a wall or hit it hard on the ground. That may cause the parts of your computer to move slightly which will result in such problems.
Recheck that every part is well seated.
Replace the power supply (PSU)
If you aren’t familiar with this piece or unit, it’s the first part of the computer the electricity reach, it’s also responsible for distributing voltages at low values to suit the tiny components mounted on the motherboard, anyway, it’s known that this part alone is responsible for many problems, replace it with another one that works fine and see if it solves the problem.
Reset the BIOS
Reset the BIOS by taking out the CMOS battery and put it back after 5 minutes, it’s usually the rounded and grey (like a grey coin).
Replace the motherboard
I know what you’re thinking, it’s a very important and an expensive part to replace, but if it all fails, then it’s probably the motherboard, go ahead and replace it, you can ask a friend or use a used one for the sake of trying, you don’t have to get a new one.
If you don’t know how to put a computer together, ask a professional technician to do it for you.
Is it a laptop monitor?
If it was, it’s probably one of two things, whether it’s the RAM and the other one is an easy solution.
If it’s the RAM, your laptop will beep declaring a bad or not well seated RAM, open it up and check what’s wrong with it, if you have two pieces of RAM use just one at a time and see if it works, if it doesn’t, replace it with another and try again.
No hope?
I hope I covered everything, your problem should be resolved by now but in case it wasn’t, seek the help of a professional to check what’s wrong and what’s causing your monitor to not work properly.
Sources:
https://www.lifewire.com/fix-computer-that-turns-on-but-displays-nothing-2624443
https://forums.tomshardware.com/threads/computer-turns-on-but-no-display-on-monitor.1287652/
https://support.hp.com/us-en/document/c03518095
https://ccm.net/forum/affich-49552-computer-powers-up-but-nothing-on-screen