Tip & How-To about Computers & Internet
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.
Posted by Dimitar... on
Sep 22, 2009 | Computers & Internet
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