Question about Computer Monitors

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Monitor failure hello thank you for your reply i have taken out the screws but still having difficulty getting into it. as the monitor is not powering up would you know if there is an internal fuse for a simple fix or does this mean its life is over! thankyou vic

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  • noseeum May 15, 2008

    I have a black screen

  • hubbgaughty Dec 06, 2008

    When i press the power button it will turn blue for 3-5 secs the turn right off. The screen will stay like as if it was turned off.


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Try to send the photo of your monitor esp view from behind and side view of may be I could provide you more help.
As for your notice no power does not meant the the fuse only blow.There might be other component shorted. Or if you have the technical background surely it will help you much.
Thank you for reply.

Posted on Apr 20, 2008

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When I power on the monitor, I get a message on the screen( INPUT SIGNAL OUT OF RANGE) then I can see Power management under and the monitor goes off after 20 seconds..what can be the problem?.thanks

  1. First check the pci cable is properly connected to your CPU.
  2. Make sure it is not loosen and it is properly screwed.
  3. Check the pins if it still intact and the wire is not worn out.
If you have additional questions feel free to reply to this solution. Thank you.

Feb 11, 2013 | LG Flatron L1515S 15" LCD Monitor


Power Light blinks on LCD monitor for computer

Alot of HP and Dell monitors run into this problem even though other brands of monitors as well can have this issue.

What happens in most cases is that there are puffy capacitors on either the power board or main board inside of the monitor itself. What needs to happen is the base of the monitor needs to be taken off, then the screws taken out of the back. Take a flathead screwdriver and there should be grooves all around the edges of the monitor, put the flathead inside of these grooves and twist the screwdriver and it should unsnap the front bezel from the back bezel.

You might have to do this all around the monitor to get enough of it loose so you can pull it all off. Once you get the back off then you should see a metal shielding like a metal box. Go ahead and unscrew the screws holding that in.

Once that is taken off, you'll see two boards, a power board where you would normally hook up a plug to it and a main board next to it which is bigger in size.

What we are looking at is the capacitors, a good capacitor looks like this:


Notice the good flat silver tops.

A bad capacitor looks like this:


You'll notice that the silver tops are swollen. If you see these then they need to be replaced. You need to have soldering experience cause the old ones will need to be taken out and the news ones put in.

Make sure the ones you put in are of the same UF rating and at least the same voltage or higher. Make sure before doing any work on the monitor that its not plugged in.

Once the new capacitors are put in then go ahead and try turning the monitor on. If it turns on then BOOM your good to go. If if still doesn't turn on then its either a bad board or the screen itself is bad but either case the monitor would need to be replaced.

on Jan 26, 2010 | Computer Monitors

2 Answers

When you power on the monitor a loud buzzing noise is made and then the monitor shuts down

Hello, welcome to Fixya!

This sounds more or less like one or more bulged capacitors on the power supply board inside the monitor. Usually, excess power is what affects these capacitor most of the time.

Unplug the monitor from the wall, get a screw driver, open the monitor back cover in order to gain access to the panel/board. Look for any visible bulged capacitor. If you don't find any, use a ohm meter and continuity tester to read the capacitor and other component on the panel so that the fault can be detected.

If you find any faulty capacitor or other component, use a soldering iron to remove the faulty component, take it to any electronics parts store or visit

Get the exact value of the defective component and solder it back. Power should be restored after doing do.

If the above task too technical for you, ask a family or friend who has the ability to assist you. (Two good heads are better that one)....

If you are still having any difficulty, please let me know and I will respond to you.

I wish you good luck.


Nov 03, 2011 | Acer X233H 23" Monitor

1 Answer


More likely the power supply/inverter board may have failed due to bad DC caps which happen after about 2~3 years.

If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses; poor solder joints, failed 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 Viewsonic and all others monitors to get some ideas what to look for:
Post back what you see inside so we can guide you further and it will help out other people in the future also.
Capacitors kit:

Jul 31, 2010 | ViewSonic VA1930WM LCD Monitor

1 Answer

Gateway FPD1960 monitor OK manuals above and below. Below is how to repair your monitor step by step, hope this helps.
I looked for a service manual, but could find none :(

Jun 06, 2010 | Gateway FPD1975W 19" LCD Monitor

2 Answers

LG1917S-BN Access to power supply - Rear cover removing

You need to use flat thin blade screw driver to crack open the case, starting at the bottom edge of the case first, you may need two screw drivers, when it starting to come apart, leave one screw driver in the partially opening section so it not snap back together while you tackle another section of the case. Most monitors cases these day do not have small slot to show where you should crack open the case at, they just do not want you to fix it.

Feb 23, 2010 | LG L1917S-BN 19" LCD Monitor

1 Answer

Monitor blinks off for about two seconds and loses power.

This problem sounds like a failure of the monitor power supply switching transistors breaking down under load conditions.This unit needs to be taken to a service center for repair. It also could be other intermittent components affecting the power supplied to the monitor. Hope this helps.

Apr 07, 2009 | Computer Monitors

1 Answer

HP F1930 Capacitors

This is how I learned to open my f1703hp monitor not sure if f1903 hp is the same...I got my open and going to replace power board waiting for the mail LOL.

Jan 20, 2009 | HP Pavilion F1903 19" Flat Panel LCD...

1 Answer

Power will not come on

If the power supply failed after a power failure is not a good sign because when the power came back it was higher then 120 VAC and could have damaged the microprocessor. Most of today power supplies are not well regulated and a slight increase on the 120 VAC it will also increase in the power supply, giving more power then needed.
It could have damage the power module as well.
Let me know if you need further assistance.

May 31, 2008 | LG Flatron L1710S 17" LCD Monitor

1 Answer

Hp Monitor

There are about 6 caps in the powersuply. Please replace them

Apr 13, 2008 | HP L1702 17" LCD Monitor

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