Computer screen starts but remains black

Asked By 130 points N/A Posted on -
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My personal home computer is a rather old one but I like it and I am sure it has not gone completely wrong all the way. I have a big screen connected to the CPU which has been flickering since the past few days. Lately when I start the computer, the screen starts as usual with a flashing sound but nothing is being displayed on it. I waited for some time but still nothing. I performed a restart on the Central Processing Unit and the same scenario occurs.

I guess my computer screen has gone down but I am not so sure about it. Also the whole lot was bought together, so how can one part be damaged and the others still running. There must be more than one damaged part in the system. I do want to repair my PC based on your guidelines folks. Please advice.

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Best Answer by Gill Bros
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Answered By 200 points N/A #108028

Computer screen starts but remains black

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How do we identify if the monitor is busted or not?

At first hand, if the monitor turns black, we don’t know where the problem comes from especially when there is an indicator that your monitor was powered on.

There are some instances that the monitor turns into black when the signal cable was disconnected from the CPU (Central Processing Unit) or disconnected at the back of the monitor but these instances rarely happened. More often, monitor turns to black when the CPU is not working or when the video card adapter is busted. So how do we know where the problem came from?

If you have an extra computer or monitor, disconnect the monitor connected to your CPU then replace it with your extra monitor. If still displayed nothing, connect your monitor to other computer or CPU just to make sure that the replacement monitor is working. Be sure that you are connecting the monitor on a good and working computer. If it doesn’t work, the monitor is busted but if it is working your problem is on the CPU.

What if you don’t have an extra monitor or extra computer, just find a friend with computer and bring your monitor to their house and connect it to your friend’s computer. If it works, bingo! You are really confident now that monitor is working. So you need to work now on your CPU. But before that, I just want to tell you that your CPU is producing sounds when there was an error on its hardware. So you will identify the error without the monitor.

Power on your computer and wait for a minute then will hear a beep sounds. That is what I am telling you before. If you hear a 3 long beep sounds, the problem is in your video card. If you hear continues long beep, no spaces between, just a solid long beep, your problem is in the memory modules. If you hear continues short beep, with spaces between, some keys in your keyboard are pressed; and if your hear nothing, your system board is busted.

WARNING: Before working inside the CPU, you must unplug the computer’s power chord from the power outlet.

Fixing your video card/adapter. Unplug your video card from your Motherboard or the system board. Then grab a pencil with eraser or just find an old eraser in your pencil case. Erase the dirt on your video card’s pins (the brass metal that connects on the Motherboard) until it becomes shining like gold.

Put back your video card on the slot where it is originally installed. Try to test your computer if it is already fixed by what you have done. Turn on the computer and with for the beeps. If you hear a single short beep, your computer is working now. Connect your monitor then enjoy your computing activity. Just proceed on the other fixing option if this method doesn’t fix the problem. Fixing your memory modules. Unplug your memory module from your Motherboard then use eraser to clean its pins. Do cleaning on both sides of the pin until it looks like a shining gold. Put back the memory modules then turn on your computer. Observe the beeps and you may hear a single short beep if your computer is already working.

Please refer to your computer manual or mother manual to locate for the memory and the video adapter card. If in case that your video adapter is built-in and you have proven that your video adapter is busted, purchase a video adapter card then install it and connect your monitor on the newly installed adapter card.

Answered By 0 points N/A #108030

Computer screen starts but remains black

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Hi Nathalie Nat,

This may help to your problem:

  1. Check for loose electrical and VGA cables. Remove the electric cord from the back of the monitor, then put it back in place. Remove the VGA cable from the computer and monitor and put it back in place. Make sure the connection is tight. If you're using a cable extender, remove it.
  2. Plug the monitor's electric cord into a different outlet. If you're using a UPS or surge protector, plug it directly into a wall outlet.
  3. Attach the monitor to a different computer. If the monitor still doesn't work, replace the monitor's cable. Make sure the cable is less than 5 feet long. If it still doesn't work, the monitor will need to be replaced or repaired. If it works with no problem on the other computer, troubleshoot your video card.
  4. Unplug your computer from the monitor and power outlet. Remove the cover. Pull the video card out of the slot on the system board. Push it back into place. Be sure the connection is secure.
  5. Put the CD that came with your video card into your computer's CD-ROM drive. Follow the directions to reinstall the video card drivers. Download a new version of the drivers from the manufacturer's website if necessary.
  6. Right-click a blank area of your Desktop. Choose "Properties" from the display menu. Click the "Settings" tab. Try different screen resolutions to resolve the problem.
  7. Determine whether the problem is caused by electrical interference. Electrical interference will make the monitor appear jumpy or wavy. Move any speakers, radios, fans or other items that can cause electrical interference away from the monitor.

If these doesn’t work. Maybe your monitor is broken and needed to be fix a technician or buy a new one.

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