Hey guys, Ive got this LCD screen in a laptop which has this about 1-1/2 inch thick "lighter bar" running up and down vertically on its screen. The screen displays the colors that it supose to behind the bar except that they are drastically lighter. Anyone know what the cause of this might be and how to fix it? thanks!
Hey guys, Ive got this LCD screen in a laptop which has this about 1-1/2 inch thick "lighter bar" running up and down vertically on its screen. The screen displays the colors that it supose to behind the bar except that they are drastically lighter. Anyone know what the cause of this might be and how to fix it? thanks!
heres a link to a picture as to what I mean:
Does the monitor have an external power supply ? If yes, I'd try it on another one first. Also, have you checked that it's not coming from the controller ( tried the monitor and signal cable on another computer - yes ? ) From the photo, the most likely bet would be one of the secondary smoothing caps at the back end of the power supply. It will be something like 1000 to 2000uF at 25v, and located just after the switching transformer. Unless it's showing obvious signs of distress, you would need an ESR meter to prove a problem, or at least a 'scope.
If you are not familiar with or confidant of the dangers of switch mode power supplies, take extra care, as they are potentially lethal, once apart. If it is an external power supply, and you prove it to be the cause of the problem, you might want to consider just replacing it with one of the many quite inexpensive generic ones available from the major parts suppliers.
Arfa
Looks like one of the column driver ICs could be bad. It's probably not cost effective to repair it if the laptop is old, unless you can find an identical screen on eBay.
If the laptop is under warranty get the vendor to fix it.
Dave
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