Tip & How-To about Computers & Internet

Fix the flashing monitor

If your monitor shows the image for just a second and gets dark, but the image is still there and is visible when you look at the screen under strong light, then your monitor has an illumination problem.
To fix this you will need screw drivers PH2 and a flat one, soldering iron, multimeter and an electronic parts supply shop at a short distance. Also, basic knowledge about electricity and ability to unsolder and solder things are needed. Old working light bulb and it's invertor from a scanner also help a lot.
Take precautions against accidents. Get rid of unnecessary objects, keep family members out of reach, wear rubber gloves.
Open the monitor. You have to remove the stand, some screws on the back and to unlatch very tightly latched plastic latches. With covers down, look for blown capacitors on the power supply board and replace them. Usually they are 1000uF/35V/105C, 470uF/25V/105C. If the problem persist, test the light bulbs connecting one at a time and turning on the monitor. Be careful not to touch any live part of the power board. Look if some of them will not flash. Replace if any. You may have to open the LCD to replace a bulb. Be careful not to break the LCD glass panel and keep parts covered against dust. Before assembly look for dust and other objects on the parts of the LCD. Remove with compressed air. Do not touch with hands, blow with mouth or clean with liquids. All these will make the image look awful.
If the inverter includes ceramic capacitor, replace it. Check the transistors of the inverter. Replace if faulty.

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My monitor only comes on for a few seconds and then goes very very dark, although the content is still there somewhere. But here's where I differ from the majority, if I can get to run System restore, the monitor will work perfectly fine again until the next morning when I need to switch it back on again. Unplugging the power lead from the back and utting it back in again will relight the screen for about two seconds before it all goes blank again.

You need to verify if it's the monitor or computer--if possible, change out the monitor with a known-good one and see if the problem still exists. If it does, then it's a problem with the video card or driver software--if it doesn't and the monitor is an LCD display, then you probably have a failing power supply or display. In an LCD monitor, there are thin, bright fluorescent tubes which give back lighting to your image. A classic symptom of the screen going dark(with the image still visible using a bright flashlight), is the power supply that feeds the tubes or the tubes themselves. If the display is not under warranty, keep "new monitor" in the back of your mind because the cost of getting the unit fixed(if it can be done) rivals the price of a new one.--Hope I was of assistance--Rick

Sep 22, 2009 | Computers & Internet

1 Answer

Screen turns off seconds after image is displayed

are using dvi cable is yoour out put on the cpu ok video out video card ect u test antehr screen on it test this one on differnt one if it bad its bad u cant usally get parts for these priotory

Feb 04, 2008 | Acer AL1916W 19" LCD Monitor

1 Answer

My screen starts out normal then the image is hardly visible


You have an LCD monitor with failing capacitors. If you have the expertise these can be purchased at Radio Shack and then you can solder them in or you can get in touch with my company at micromend@live.com and we'll discuss a repair plan.


Jun 20, 2009 | LG Flatron L1511S 15" Flat Panel LCD...

3 Answers

monitor acer lcd AL1717a

Looks like you have a burned lamp.
Most LCDs have a lamp that lights the screen's image.
If you see the image, but its too dark.....you need a lamp replacement.

Please rate this answer if its useful

Jun 18, 2009 | Acer AL1715 17" LCD Monitor

1 Answer

dark image

Flyback transformers usually have 2 adjustable rods - 1 is for focus the other is for screen (G2) voltage. try turning Clockwise the Screen adjust with brightness-contrast at max. Till you see white diagonal lines, then go back until the lines disappear - then tune the brightness to your desired level.

Apr 27, 2007 | LG Flatron Ez T710BH 17" CRT Monitor

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