No signal to PC screen

Asked By 130 points N/A Posted on -

What do I have left to do when I am not getting an image on my screen? I have the traditional desktop personal computer. Last week it has worked smoothly but on shutting down I heard the screen making some flashing sounds.

I already verified the connections to the graphics card with correct screwing the two bolts on the blue screen plug. I removed it, cleaned it, verified that all pins are in correct positions and put it back. Still I am getting a blinking power led on the computer screen when the Central Processing Unit is booting up.

I would love to have another computer screen to verify if my screen has gone down but another screen will not be available to me for the time being. I prefer some quick diagnostics to know which parts have gone wrong for I want to change for only the damaged parts in my PC.

Best Answer by Gill Bros
Best Answer
Best Answer
Answered By 205 points N/A #108014

No signal to PC screen


No Signal Displayed on the Monitor.

No signal message displayed on the monitor comes from the BIOS of your monitor. This means your computer is not connected to the computer nor doesn’t receiving any signal coming from the video adapter.

There so many reason why a monitor displays the “No signal” message on the screen. So you need to consider the following items for you to fix your computer.

Signal cable and its connection from video card to the monitor. Most of the time we forgot to check the signal cable on the back of the monitor when we receiving errors. Check it’s the connection on the back of the monitor. Be sure that the cable was plug properly. The cable can’t be plug-in in reverse order because of its “D” shape so there is a not possibility that you plug your signal cable in reverse order. Just check them unplug the cable and plug it again just to make sure the cable was plug-in properly. Next is checking the cable at the back of the CPU (Central Processing Unit) if it is connected properly. Just do the same to make sure that the signal cable was plug-in. If problem still exists, move on the other fixing option.

Video Adapter and its connection to the Motherboard. If your video card adapter is built-in, just move on the other fixing option. Let’s say it is not built-in, unplug your video card, grab a pencil with eraser or just an eraser, and erase the dirt on the pins of the video card until it looks like shining gold. Plug your video card on the slot from where you extract the video card before.  WARNING: be sure you unplug your power chord from the power outlet to avoid electric shock when you are working inside your CPU. Turn on your computer once again to check the changes. If nothing was fixed move on to another option.

Memory and its connection to the Motherboard. The same with what you did on the Video Card adapter, pull out your memory modules, grab an eraser and then erase the dirt on the memory pins so that the connector on the memory slot will be properly connected or intact. Put it back then turn-on your computer to check if it working now. If nothing happened, move on the options.

NOTE: When there is a problem in your video card or in memory, you will hear a sequence of beeps and this is what we called the beep error codes. For more information about this audio beep error codes, refer to your motherboard manufacturer manual.

Motherboard of the computer and hardware. Unplug all peripherals connected into your motherboard, power-on your computer and wait for the long beep codes. If don’t hear anything, there is a possibility that your motherboard is busted or the processor. If you hear a sound, put your memory and video card on their slots. If you still hear a sequence of beep codes. Try to replace the memory, then next is the video card if error persists. If it is working already, plug all other peripherals one by one after checking the output on the screen. If you plug the device then screen displays “No Display” diagnose or replace that peripheral. If still cant be fixed, replace your motherboard.

Power source. There are some instances that our power source cannot supply the necessary power needed for the CPU. If your CPU does not properly power, the computer could not work.

Your monitor is good because the monitor is able to display message.

  • Signal cable and its connection from video card to the monitor;
  • Video Adapter and its connection to the Motherboard;
  • Memory and its connection to the Motherboard;
  • Motherboard of the computer and hardware.
  • Power source
Answered By 0 points N/A #108015

No signal to PC screen


Hi Katy Cute,

This may help to your problem 

You should check first the cables that are connected to your monitor and to your CPU. Unplug them and plug it again. Second you should check your  Video card. Remove it to the case and clean it. The put it back again. If you do this  and the problem is there  the problem is your monitor. Try to call a technician to check your monitor and repair it if it has problems or replace it.

Answered By 0 points N/A #195368

No signal to PC screen


I think that you have a hardware problem. It will be hard to determine which bolts are failing. Just try to unplug your monitor from the CPU. Find another CPU and connect your monitor to it. Check if it will work. If it works without issues, then the problem may be on your computer system. Either on your video card or the RBG cable connecting the monitor and CPU or can also be a bad mobo. If not, then you have a problem with the monitor itself.

Another trick that can help you fix the no signal issue is to remove the monitor on the power cord. Then, hold the power button for a minute and then reconnect it again to the power cord and then turn the monitor on again.




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