Question about ASUS MW221U LCD Monitor

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Lately the 'brightness' window pops up all the time and doesnt go away

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  • Louis Ebert Sep 28, 2010

    If your MW221U has same symptom when connected to a fully booted "known good" pc with WIN-desktop displayed, then the first place I would investigate would be the monitor's ac to dc power supply called "switch-mode-power-supply/ CCFL inverter" printed circuit board!! How old is unit? What is date of manufacture? Is unit covered by warranty? Have you seen any of the video clips of "cold cathode fluorescent lamp, back-lit, LCD monitors being disassembled and having their SMPS's repaired at YOUTUBE for filter capacitor replacement??? All commercial and private owners of LCD monitors should do extensive research at YOUTUBE first!! Even if their units are functioning perfectly!!! All owners should understand the 1 or 2 most common causes of malfunction or "black, or black n blank" screen failure modes. Your ASUS unit isn't any different than any other brand of CCFL lcd monitor!! ALL use the same basic engineering design and principle of operation to display text and graphics on their glass lcd panels!!! After YOUTUBE research, return here to fixya and do some reading in the FIXYA PROFILES of lcd monitor tech's "budmrtn" "buddymc" "12fixlouie" and a whole host of other excellent profiles that have lots of DIY lcd repair information for you to use in your repair quest.

    If this was of some use, please rate this response on fixya and /or leave comment. 12fixlouie



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Hold the 4th button ,while holdin it press the 1st button(counting from left to right)

Posted on Dec 25, 2010


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What is "OPC"? It comes up and goes away.

OPC_ Optical Picture Control
Automatically adjust the brightness of the screen.
You can change the settings in the menu option.
It's in Menu, then picture, then OPC.

OFF- The brightness is fixed at the value set in "Backlight"

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