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The issue if your light bulb behind the LCD matrix is burnt out you need to replace them. This is common for these monitors. The bulbs simply snap off an on by a connector to the high voltage power supply. When you open the monitor up, you will see he board with HV supply on it Trace the two (red an white) wires to the backlight (bulbs) and verify by looking at their ends looking for black discolor at he ends of the bulb (This means the interior of the bulb is carbonizing = shorting out). Most times the monitor will shut down into orange light, but sometimes it will not ignite the fluorescent bulb)(s).
first check the supply of the LCD monitor check the plug supply usually 110V or 220v use a voltmeter, if the voltage is present look for the indicator lights that is changing when power switch is press,the indicators tells you if the problem is in the power supply area of the LCD monitor or in the screen, usually the problem with the LCD monitors is in the screen check the bulb on top of the monitor check if it is not function well this bulb is responsible for the brightness of the screen if it is defective replace it or maybe the supply of the bulb is defective you can use the power supply of the cathode light as a replacement to its supply that is usually use in motorcycles signal lights.. hope this helps you..
Diagnosis: 1. Test using an external monitor. If it works, then either the screen bulb or the inverter board might be defective. 2. Test the inverter. Easiest way to do it if you have a good screen with a good bulb. Connect the good screen to the inverter board & test it. If it lights up, then the inverter board is good. If it did not, then the inverter board is bad & needs to be replaced. 3. If the inverter board is good, then we are left with the possibility that the screen bulb is bad. To fix this, we will need to replace the LCD screen.
take a flashlight and look closely at it. Quite often the Backlight transformer burns out. then the light wont come on. if this is your problem, you will be able to see your windows screens very faintly by using a flashlight. just a thought.
most rear tail lights and turn/stop lights are the same dual filiment bulb. it is possible for your tail light to work and your brake light not to and still have a bad bulb. I would check the bulb first, your brake light works on the left yes? this would mean that the fuse is fine
Chances are that you are not hurting anything with the lower power supply. What is probably happening is most likely two fold.
1. The light bulbs in the backlight circuit may just be wearing out and need replacement, and
2. the lower current power supply may not be capable of producing al the current that the monitor needs at certain times during operation.
I would suggest getting hold of the correct power supply module and see where that gets you. If you still have the red outs,replace the light bulbs in the monitor. The only other fault than that would have to be in the video controller.
Hope this helps.
Sounds like the back light inverter board is bad.
It's a very common problem.
LCD's use four small cold compact fluorescent bulbs to back light the display. (thats what gives the LCD it's brightness allowing you to see it)
The inverter board runs these lights and when they go bad they will typically show symptoms like you have or the monitor power light comes on and you have either no display or a very dim display.
If you ever have one that has no display but the power light is on you can check by shining a flashlight directly into the LCD from the front (right into the screen) if you can see an image then it's either the inverter board (most likely) or the CCFL bulbs have gone bad.
The inverter board and CCFL's are replaceable.
If you have the pc on and the monitor light stays green, take a flashlight to the screen. If you can see the images while shining the flashlight into the screen, they will be hard to see but they will be viewable, then its most likely the back light. The vx900 takes 4 bulbs and they are about $12 US each. Anyone who knows how to solder should be able to replace them.