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IH252 inc monitor bottom half darker than top.

About 3 days ago my monitor an iH252 INC 25'' monitor, the bottom right corner look darker than the rest of the monitor. The next day the entire bottom half was darker than the top. Example, if you put brightness and contrast at 100% each the monitor will be really bright. But if you lower it to 50% it's a little dark. Well my monitor is like that, as if the top is at 100% and the bottom is at 50%.

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  • JoeP Jul 29, 2013

    I've reset to factory default, and even turned up brightness and contrast to 100%. I've set the "Color Setting" to all available ones, "User, cold, warm etc." I reconnected the HDMI cable, reconnected the power cable. Still the bottom half just stays darker than the top.

  • JoeP Aug 10, 2013

    Ah, yes this monitor is about 3 and a half years old. I've gone and put max brightness and contrast, so after about 20 minutes I forget about it. Since that's the only problem with the monitor at the moment, I'll just have to wait til it gets worst and then upgrade hehe. Thank you for the help, I appreciate it.

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Thin screen LCD monitor brightness controls operate several fluorescent lamps called "backlights" that are positioned behind the LCD display. Typically, they're located around the edges of the screen - sometimes just at the top and bottom, and other times at the left and right edges and others still at all 4 edges.

iH252 inc monitor bottom half darker than top. - 84fdffef-ec73-450a-8fb9-5901d3322462.jpg
Fluorescent "backlight" lamp, inverter & connection wiring.

The lamps are miniature versions of those sold in stores. They require a support circuitry called an inverter that convert & boosts the level of DC to AC voltage performing the functions of a ballast in a traditional fluorescent fixture.

The reason a part of your screen remains dark is because one or more of the components in the picture above has failed and will not allow the lamp to shine. Replacement lamps and inverters aren't expensive - but requires patience and the ability to disassemble / assemble the monitor (which is usually harder to do than it appears) and solder. They are available various lengths and color temperatures (you must get a lamp that is identical or it will be noticed). If this is a new monitor - you ought to return it for replacement. If used, consider the cost of purchasing a replacement (new or used) vs. repair.

I hope this helps & good luck!

Posted on Aug 09, 2013

Testimonial: "Ah, yes this monitor is about 3 and a half years old. I've gone and put max brightness and contrast, so after about 20 minutes I forget about it. Since that's the only problem with the monitor at the moment, I'll just have to wait til it gets worst and then upgrade hehe. Thank you for the help, I appreciate it."

  • JoeP Aug 10, 2013

    Great help, thank you.

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