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Monitor goes blank after short time - Computers & Internet

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Monitor usually goes blank because there is No Video Signal. (No signal)

This is because the computer isn't working to send a video signal.

Usually caused by a bad Power Supply.
Weak voltage power rail.

1) ALL the LED lights use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use 51 to 125 Watts of power. Depends omn what Processor it is.

This is why you may have LED lights lit, and maybe fans spinning, but no computer.
Not enough power to turn the Processor on.

A failing or bad Power Supply is one of the leading causes of computer failure.
Another one is the computer, and Power Supply are dirty inside.

Change the Power Supply to a KNOWN to be good, Compatible one, for a test.

You never know, someone may have upgraded to a better computer, and have a working computer laying around that you can borrow the Power Supply for a test unit.
(Compatible, and known to be good Power Supply)

Post the computer manufacturer name, and Model Number in a Comment.

Posted on Oct 12, 2010

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  • Master
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One of two things are happening here. Either there is a problem with the cord and/or electrical connection or there is too much dust in the ventillation holes on the monitor and its over heating. If you have not changed the power cord, then try relocating to a different power outlet. Then clean out the ventillation holes with a can of spray air and dusting.

Posted on Oct 12, 2010

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Posted on Jan 02, 2017

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1 Answer

Samsung monitor goes blank after working perfectly for a period of time.


Have you checked monitor settings Carl? Some are set to sleep after a certain period of time. Mine was set to sleep after 1 hour (unknown to me) until I reset it. =)

Dec 06, 2015 | Samsung 933BW 19 inch Monitor

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When I turn on the computer, the monitor comes up normally and then goes blank. If I then recycle the power on my monitor, it comes on and works normally. If I plug a device into the USB ports on the...


Most common failure in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, falied inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what goes wrong: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further.

Mar 27, 2010 | Gateway FPD2275W LCD Monitor

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Monitor goes blank but is still connected


Do bios update on Computer.Select the product number and search on Website for bios and than try the monitor

Oct 13, 2009 | Computers & Internet

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Gateway Monitor goes blank after a few seconds after startup.


Sounds like the inverter is broken or have a short circuit. This is a common failure on TFT displays.

Here is a website explaining this kind of failure:
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Oct 09, 2009 | Gateway FPD2275W LCD Monitor

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Screen blanks out seconds after being turned on. A small whiny sound can be heard for the short time its on.


believe me u cannot fix this problem you can only make ti go away, when monitor goes blank, hit windows button on keyboard and programs will open, on the TASK BAR you will see blank page windows, double click it away, usually last all day, regard robert

Aug 23, 2009 | Acer Computers & Internet

1 Answer

Lg w1934-bn blank screen after start up, power light on . same problem occurs on different computers used.


Reason 1: Wetness The number one reason why computer monitors go blank is - wetness. Believe it or not, when your computer monitor is exposed to humid air, sometimes water can condense and accumulate in the monitor. This causes the monitor to malfunction and go blank. I've had this happen to my desktop PC at least three times before. What you need to do is to leave the monitor alone for some time and allow the water to evaporate. That usually solves the problem.

Reason 2: Faulty Graphics Card The next reason why your computer monitor goes black is due to a faulty graphics card. The best way to detect this kind of problem is to connect up a new monitor to your PC, then check if you have a blank screen. If you continue to have a blank screen, then it's likely your video card is faulty.

Reason 3: Faulty RAM This one is less obvious and less common, but it can happen. You might sometimes get bad RAM modules which prevent your PC from booting up even to the basic BIOS startup screen. To detect this kind of problem is more troublesome, you might need to remove those RAM modules and insert them into another computer.

Reason 4: Loose Connections Another reason why your monitor goes blank is due to loose connections. The connection from the monitor to the mains is usually a culprit, as is the connection between the monitor and the video card. Check those connections before you declare your computer monitor as faulty.

Reason 5: A Short Circuit In The Motherboard And the final reason why your computer monitor goes blank? It's possibly because of a short circuit in the motherboard. This is the most undesirable outcome of course, as you might have to replace your entire motherboard. However, it's possible that this can happen - so keep your fingers crossed and hope it doesn't happen to you.
i think this will help.
please rate my solution.
have a nice day.

Jul 05, 2009 | ViewSonic 17" 1280x1024 TFT-LCD/ Speaker...

3 Answers

My monitor went black, and the power switch just flashes.


is your CPU working properly? if that the case, your monitor is in need of a service.
reasons for why a monitor goes blank?
Reason 1: Wetness
The number one reason why computer monitors go blank is - wetness. Believe it or not, when your computer monitor is exposed to humid air, sometimes water can condense and accumulate in the monitor. This causes the monitor to malfunction and go blank. I've had this happen to my desktop PC at least three times before. What you need to do is to leave the monitor alone for some time and allow the water to evaporate. That usually solves the problem.

Reason 2: Faulty Graphics Card
The next reason why your computer monitor goes black is due to a faulty graphics card. The best way to detect this kind of problem is to connect up a new monitor to your PC, then check if you have a blank screen. If you continue to have a blank screen, then it's likely your video card is faulty.

Reason 3: Faulty RAM
This one is less obvious and less common, but it can happen. You might sometimes get bad RAM modules which prevent your PC from booting up even to the basic BIOS startup screen. To detect this kind of problem is more troublesome, you might need to remove those RAM modules and insert them into another computer.

Reason 4: Loose Connections
Another reason why your monitor goes blank is due to loose connections. The connection from the monitor to the mains is usually a culprit, as is the connection between the monitor and the video card. Check those connections before you declare your computer monitor as faulty.

Reason 5: A Short Circuit In The Motherboard
And the final reason why your computer monitor goes blank? It's possibly because of a short circuit in the motherboard. This is the most undesirable outcome of course, as you might have to replace your entire motherboard. However, it's possible that this can happen - so keep your fingers crossed and hope it doesn't happen to you.
try this.
please rate my solution.
have a nice day.

Jul 05, 2009 | Dell E152FP 15" Flat Panel LCD Monitor

1 Answer

My monitor AOC 912Sw-4 does not turn on. Power button`s led is flashing all the time.At the beginning I waited some minutes and I could use it normally, but right now it is impossible see any image on it.


only choice is to give the monitor for service.
anyway read this, this help you.
is your CPU working properly? if that the case, your monitor is in need of a service.
reasons for why a monitor goes blank?
Reason 1: Wetness
The number one reason why computer monitors go blank is - wetness. Believe it or not, when your computer monitor is exposed to humid air, sometimes water can condense and accumulate in the monitor. This causes the monitor to malfunction and go blank. I've had this happen to my desktop PC at least three times before. What you need to do is to leave the monitor alone for some time and allow the water to evaporate. That usually solves the problem.

Reason 2: Faulty Graphics Card
The next reason why your computer monitor goes black is due to a faulty graphics card. The best way to detect this kind of problem is to connect up a new monitor to your PC, then check if you have a blank screen. If you continue to have a blank screen, then it's likely your video card is faulty.

Reason 3: Faulty RAM
This one is less obvious and less common, but it can happen. You might sometimes get bad RAM modules which prevent your PC from booting up even to the basic BIOS startup screen. To detect this kind of problem is more troublesome, you might need to remove those RAM modules and insert them into another computer.

Reason 4: Loose Connections
Another reason why your monitor goes blank is due to loose connections. The connection from the monitor to the mains is usually a culprit, as is the connection between the monitor and the video card. Check those connections before you declare your computer monitor as faulty.

Reason 5: A Short Circuit In The Motherboard
And the final reason why your computer monitor goes blank? It's possibly because of a short circuit in the motherboard. This is the most undesirable outcome of course, as you might have to replace your entire motherboard. However, it's possible that this can happen - so keep your fingers crossed and hope it doesn't happen to you.
try this.
please rate my solution.
have a nice day.

Jul 05, 2009 | AOC 912SW-4 Monitor

1 Answer

Monitor is just not turning on


is your CPU working properly?
if that the case, your monitor is in need of a service.
anyway read this.
this may help you.
reasons for why a monitor not turning on?
Reason 1: Wetness
The number one reason why computer monitors go blank is - wetness. Believe it or not, when your computer monitor is exposed to humid air, sometimes water can condense and accumulate in the monitor. This causes the monitor to malfunction and go blank. I've had this happen to my desktop PC at least three times before. What you need to do is to leave the monitor alone for some time and allow the water to evaporate. That usually solves the problem.

Reason 2: Faulty Graphics Card
The next reason why your computer monitor goes black is due to a faulty graphics card. The best way to detect this kind of problem is to connect up a new monitor to your PC, then check if you have a blank screen. If you continue to have a blank screen, then it's likely your video card is faulty.

Reason 3: Faulty RAM
This one is less obvious and less common, but it can happen. You might sometimes get bad RAM modules which prevent your PC from booting up even to the basic BIOS startup screen. To detect this kind of problem is more troublesome, you might need to remove those RAM modules and insert them into another computer.

Reason 4: Loose Connections
Another reason why your monitor goes blank is due to loose connections. The connection from the monitor to the mains is usually a culprit, as is the connection between the monitor and the video card. Check those connections before you declare your computer monitor as faulty.

Reason 5: A Short Circuit In The Motherboard
And the final reason why your computer monitor goes blank? It's possibly because of a short circuit in the motherboard. This is the most undesirable outcome of course, as you might have to replace your entire motherboard. However, it's possible that this can happen - so keep your fingers crossed and hope it doesn't happen to you.
try this.
please rate my solution.
have a nice day.

Jul 04, 2009 | Computers & Internet

1 Answer

Monitor goes blank after being on for a little bit.


A COMPONET INSIDE THE MONITOR IS SHORTING OUT TO THE FRAME OF THE MONITOR, OR YOU MAY HAVE A CAPICITOR GOING BAD INSIDE THE MONITOR, SO TO THE TV SHOP TO GET REPAIRED OR BUY A NEW ONE.

CANDYMANGANDY

Jan 29, 2009 | Dell Computers & Internet

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