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Monitor randomly goes black


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#1 Magdalena

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Posted 25 November 2014 - 08:25 PM

My monitor has been going black very randomly for a second and will come back on. It has no rhyme or reason to when it does it. Sometimes it won't do it for weeks at a time and sometimes it will do it over and over for several days in a row. I've swapped out the HDMI cable with 3 different cables and it still does it. It's hard to diagnose because like I said it can be days between when it does it again at times and doesn't seem to follow a specific task happening on the computer. Only reason I'm posting this now and not sooner is that it has done this about 15 times in the last 2 hours so I'm hoping I will be able to diagnose this now.

 

On a side note, it does not appear to be a power issue either as the power light on the monitor does not goes off.


Edited by Magdalena, 25 November 2014 - 08:28 PM.


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#2 Citizen_WD

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Posted 26 November 2014 - 06:00 AM

Hello,

If the monitor is staying on, but you loose the video signal it's very likely that this is an issue with the video card or motherboard in the computer. Does it show a "No input signal" message or something similar? Does it turn off or it goes to black? (there is a difference, if it goes to black it will still glow in a dark room for example)
 I would recommend you try with another monitor for a few days to see if the problem will occur again. If it does it is safe to say that you have a graphics card or motherboard problem. If it doesn't than your monitor may have a capacitor problem for example. In that case you may want to replace it or send it for repairs to a specialist.
 
Best regards, Citizen_WD


#3 Platypus

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Posted 26 November 2014 - 06:14 AM

 the power light on the monitor does not go off.

If the power indication is unchanged, so the monitor is not going into standby, that is commonly loss of the backlight function. As Citizen_WD said, if the backlight shuts off, the screen will be dead black when viewed in a dark room. See if you can catch it doing it at night and quickly switch the room lighting off. If you see a low, inky glow from the screen, it is seeing a black signal, which would indicate a computer fault or a faulty input board in the monitor. If the screen is dead black, the backlight is off.

 

Another way of isolating the source is to use the monitor on another computer, or borrow another monitor for a while on your computer, to see which combination still shows the problem.

 

Also, if we know what monitor it is, we might be able to pick up if maybe, for example, backlight problems are common for that model.


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#4 Magdalena

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Posted 17 June 2016 - 06:41 PM

I ended up finding out that the hdmi port on the back of my monitor was the cause. Had to swap to a VGA cable.



#5 Platypus

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Posted 18 June 2016 - 11:20 PM

Thanks for letting us know the result!

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