Repairing Blurred screen failure of laptop LCD

Blured screen failure of laptop LCD indicated by

1. The screen is Blured
2. Image not clear
3. System normal
4. Normal when use external monitor
5. Back light normal

To repairing and solving this failure do the following steps :
1. Open LCD chasing
2. Look for a "trimpot" or a electronic component that can in turn use a screwdriver in addition to bolts/screws. This component behind the LCD scenes upper left, looked from back of LCD.
3. Turn right with the screwdriver continuously until the screen of LCD normal. Find the right position of this "trimpot"
4. After normal re-assemble cashing of LCD

I has proved this steps for Acer Aspire Laptop and success.
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