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Re: No backlight on the monitor
This is usually an indication that the monitor is bad. I would try to secure all of the cables and if you have another monitor or Flat Panel TV to try; see if the picture is better. If so, then the monitor itself is bad.
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Try holding a flashlight (or other very bright light) an inch or two away from the screen while it's on. If you can see your background very faintly, then the backlighting of your monitor has gone out.
There are a lot of tutorials on how to replace backlighting (like this one: http://www.instructables.com/id/How-To-Replace-a-LCD-Backlight/ ) or you can just buy a new monitor.
If you can't see anything with the flashlight, then it might be a bad capacitor, which is usually about the same in cost and labor as a new monitor.
The backlight invertor seems to be defective.
Check the main power supply board for bad capacitors (visible damage ) and make sure that the invertor tubes do not light up for a moment when you power up the monitor ( in that case their probably is one or more light tube defective (burnt)) --
use a flahlight see if you can see an image faintly in the screen, if so the backlight is failing. if not, check your VGA or DVI cable connection on both ends. sometimes there is more than one port on the back of the computer, try the other port if you have two of them,
ok, we have two options here, either the power inverter that turns on the backlight has stoped working or the backlight itself is not working. in these both situations, the best for you will be to ask to a local technician to replace it for you. but you may want to verify first if it's worth it to repair due to the low prices on lcd monitors nowadays.
If the backlight was out it would stay on but you would see nothing (or very very faint) ....test it on another device...laptop or PC...I'm thinking it works still but maybe your video card bit the dust or maybe computer is not getting past the post (bios boot)...
- lcd backlight inside the lcd, or the inverter itself. Can you see a very faint image?
- Very hard to tel if it's backlight or inverter, or both. Each part costs about $30.
Labour is not included, but will cost roughly $75. Still much cheaper to repair than to buy new parts from nanufacturer.
It could be your LCD backlight giving you problems. When the image "goes off" shine a flashlight in the lower left hand corner of your screen. Look for the ?Start? button, if your backlight is not working you?ll see a faint ?start? button if you look closely. Depending on the monitor this is usually and economically repairable problem. Let us know if you have any other questions and please don?t forget to rate this posting.
It could be your LCD backlight giving you problems. With the computer on and the monitor power LED green shine a flashlight in the lower left hand corner of your screen. Look for the Windows ?Start? button, if your backlight is not working you?ll see a faint ?start? button if you look closely.
It could be your LCD backlight giving you problems. With the computer on and the monitor power LED green shine a flashlight in the lower left hand corner of your screen. Look for the ?Start? button, if your backlight is not working you?ll see a faint ?start? button if you look closely.
If you can see the start button then it?s either the backlight tube or the electronics that controls it. This is repairable but I would not recommend the typical user try it unless they have tools and some experience with disassembly and handling of electronic components. It goes without saying that if you are unwilling to risk damaging the monitor you should take it to your local repair shop. You will spend about $50 more in labor but you save yourself guessing which parts are bad (a potential savings) and you will typically get a warranty of sorts.
If you don?t see the start button I would next suggest you connect this monitor to another computer to see if the problem goes with the monitor or stays with the computer.
Let us know what happens and if you need some more assistance.
It sounds like the backlight has burned out. The faint light you are seeing is ambient light in your room being reflected through the LCD. Try it in a perfectly dark room and see if you can see anything on the screen.
The following page should give you a sense of what is involved in replacing a backlight:
If you aren't comfortable taking things like this apart, I would recommend finding a local repair shop to replace the backlight.