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After 15 -20 min my monitor goes blank

After 15 -20 min my monitor goes black and the power light of monitor starts blinking..... with nothing on the screen..... but the pc is still running n on....

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  • rahulgtrived Nov 14, 2008

    Thank you.... ill try the instructions u hve given....

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This could indicate a problem with the graphics card. Take the card out and clean it, then clean the slot that it fits into. (I normally use a small dry paintbrush).

Replace the card, making sure that you push it down gently but firmly and ensure that the plastic clip has gone back correctly that hold the card in place. Rescrew the card back to the casing correctly and reboot.

Hopefully this will resolve your problem. If it does not, to determine whether or not your graphics card is faulty. Change the monitor lead over to the onboard graphics port instead of the agp/pci port and reboot. If the monitor works properly with no problems, then you have a bad graphics card.

I hope this helps.

Posted on Nov 13, 2008

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My pc dont show any thing axcept blank display with i tried to change graphics


Maybe one of your memory chips is bad.

If it seems to boot up all the way except the display is blank try the steps below:

Borrow a monitor from a neighbor, friend, relative or co-worker and connect it to the computer. If the Borrowed monitor display the desktop then the original monitor is bad, but the video card inside the computer is ok. If the Borrowed monitor does not display then the video card inside the computer is bad.

If it does not seem to boot up all the way try the steps below.

When you plug in the power cord is there any lights whatsoever on the laptop, where the plug goes in or on the AC Adapter of the power cord?

When you press the power button do you hear fans running, hard drive spinning, lights on the computer, hear any beeps or lights constantly blinking, hear the DvD/CD drive click and the light on the drawer of the DvD/CD turn on for a second or two? If so the computer is trying to boot or may have booted, but the screen is not showing for some reason.

Beep tones and blinking lights tells the technicians what is going on with the laptop and why it is not booting. Most times it's a motherboard issue when you hear beeps or blinking lights continuous. Most times the problem is with the memory or Video Card. Count the Blinking Lights or Beeps and take note of their pattern (1 Long or 1 Long followed by 2 Short).

Maybe you have a Static Charge Buildup. Remove the Power Cord, then Press and Hold the power button for 30 seconds. After 30 seconds plug the power cord back in and hit the power button to see if it boots.

Maybe your memory is bad or the memory slot is bad.

Remove the Power Cord, Open the Case and remove one of the memory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x on it with an ink pen. If it fails to boot then move the chip to the next memory slot and try rebooting. If it fails take the chip out and set it aside, then put the other chip in and try booting it in both slots. If it boots, just to verify that the chip set aside is bad, mark an x on it and put it into the open memory chip slot and try booting.

Jun 07, 2012 | Intel Computers & Internet

1 Answer

It start power only


If it seems like the latop booted up except the screen is black try the steps below.

Shine a flashlight on the dark screen to see if you barely see the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can be any kind of monitor even the old big fat crt monitors as long as it has a vga cable to connect to your computer's vga port. If so that proves your video card is ok. The video will show on most systems when you reboot without you having to do anything. Some systems will require you to hit the FN (Function key) + F1 thru F12. Hold down the FN key then hit the correct key for displaying on the monitor (F1 thru F12). The correct key will normally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works, then your screen is bad. If you see no icons by shinning the flash light and nothing shows on the external monitor, then most likely your video card is bad.



If the laptop does not start at all try the steps below.


When you plug in the power cord is there any lights whatsoever on the laptop, where the plug goes in or on the AC Adapter of the power cord?

When you press the power button do you hear fans running, hard drive spinning, lights on the computer, hear any beeps or lights constantly blinking, hear the DvD/CD drive click and the light on the drawer of the DvD/CD turn on for a second or two? If so the laptop is trying to boot or may have booted, but the screen is not showing for some reason.

Beep tones and blinking lights tells the technicians what is going on with the laptop and why it is not booting. Most times it's a motherboard issue when you hear beeps or blinking lights continuous. Most times the problem is with the memory or Video Card. Count the Blinking Lights or Beeps and take note of their pattern (1 Long or 1 Long followed by 2 Short).

Maybe your power cord is bad if you don't get anything to happen whatsoever when you press the power button. And if that's true maybe you was operating off the battery the last time you had it on and since the power cord is bad, it was not charging the battery so the battery is drained and the power cord is bad.

Maybe you have a Static Charge Buildup. Remove the Power Cord, Remove the Battery, then Press and Hold the power button for 30 seconds. After 30 seconds plug the power cord back in (leave the battery out) and hit the power button to see if it boots. If it does, you can put the battery back in and let it charge.


Maybe your DC Power Jack which is where the power cord plugs into the computer is bad. Take an ink pen and push the tip inside the jack and see if the little pin wiggles, if so the jack is bad. You'll have to take the laptop apart to fix it. Most times it is soldered onto the motherboard, so you will have to desolder the old and solder a new one.


Maybe your memory is bad or the memory slot is bad.

Remove the Power Cord, Remove the Battery, Remove the cover that houses the memory on the bottom of the laptop then remove one of the memory chips. Set the chip aside then try rebooting the computer. If it boots, then you know the memory chip you set aside is bad so mark an x on it with an ink pen. If it fails to boot then move the chip to the next memory slot and try rebooting. If it fails take the chip out and set it aside, then put the other chip in and try booting it in both slots. If it boots, just to verify that the chip set aside is bad, mark an x on it and put it into the open memory chip slot and try booting.

May 26, 2012 | Compaq Computers & Internet

1 Answer

Due to power variation my display suddenly goes blank, then i powered off my system. again restarting there is no display on monitor only monitor light blinks.cpu is working properly ,hard disk, ram ,heat...


if it is an on board video sound like it got damaged by power failure,try adding on a video board and disable on board video in bios,make sure you have an avalible slot to add board

Feb 02, 2011 | Intel Motherboard

1 Answer

My monitor screen is blank even when i connect it to my desktop and the power light keep blinking green and the screen is black


I had this problem before, my computer is running but nothing come out from Monitor. Eventually I unplug one of the Memory ( I have 2 Memory), it works fine. Good luck!

Jan 10, 2011 | Computers & Internet

1 Answer

I have a P4M890T-M2 motherboard. When i start my computer my monitor goes blank and two lights on my tower blink -- short blink long blink-- over and over. i do not believe this MB has a place for a...


First test your CPU then tast all leads that are attached to your hard drive sounds like a faulty lead of some sorts then
try replacing all the leads that attach to your hard drive including electrical extensions + IDE,SATA and the ones that attach from your motherboard to hard drive

Sep 04, 2010 | EliteGroup P4M890TM2 (V1.0B) Motherboard

1 Answer

Monitor 'black' with blinking power light


It helps if we know what kind of computer you have, and the model. Go to the manufacturer's support site online. (HP.com, or Dell.com, etc) and search product support for your model # and then search for blinking lights or error lights + black screen or search startup problem and see if you can find the page that explains what the light codes for your system indicate.
Your power supply may have failed. See also link to startup troubleshooting here.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

Jun 17, 2009 | Dell System Board for Optiplex GX 150,...

1 Answer

Why is my Monitor blank when i switch on the pc?


Normally, blinking indicator lights and no display on the monitor indicating a wrong resolution or refresh rate frequency, that the monitor can not display it.
To fix, enter safe mode, and configure the display to the lowest resolution. After restart, you should be able to have the display.

Dec 31, 2008 | Intel D945GCCR Motherboard

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