Question about Toshiba Satellite A75-S209 Notebook

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Toshiba A 75

Dim lcd screen

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The used inverter maybe faulty. The inverter supplies high voltage to the CCFL lamp in the LCD screen, the CCFL lamp provides the backlight.
LCD screens and Inverters are available from this WEB site.
www.lcdparts.net

Posted on Feb 16, 2012

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SOURCE: dimmed lcd

Look for an icon on your keyboard that shows brightness like a sun drawn on the keys. try pressing that together with Fn key, or if you cant see that icon, try fn key and up arrow key or right arrow key. See if that one would work.

Posted on May 27, 2010

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The used inverter maybe faulty. The inverter supplies high voltage to the CCFL lamp in the LCD screen, the CCFL lamp provides the backlight.
LCD screens and Inverters are available from this WEB site.www.lcdparts.net

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Try reseating the lcd cable on the back of the LCD and also where it plugs into the motherboard. If you still can't get a normal screen and it stays dim then its going to be either your lcd is bad or the inverter that supplies the voltage to the lcd (inverter is located underneath the lcd, small rectangular board) is bad.

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The backlight CCFL lamp provides the lighting for the LCD screen. If you have already adjusted the brightness to the max. setting and it is still dim, it means the CCFL lamp is is nearly worn out. To determine if you have a LCD screen or video card problem, read this and follow the instructions. Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp. Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case. The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills. Check out www.lcdparts.net for parts, repair service and DIY info.

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When it first switches over to battery, you will generally see a flicker. The dimness is normal. Most laptops are configured to display the LCD screen when on battery power to allow longer operation on battery power. This can be overridden in the Control Panel -> Power Options but doing so will reduce the amount of time you will be able to work on battery power. The time before it enters sleep mode is generally shorter as well for the same reasons.

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1 Answer

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With the replacement screen did you replace the inverter board? Many laptop screens also have a very small fuse built into their power connecttions. Check this also.

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You can brighten or dim the LCD screen by pressing the Fn key plus another key with the a sun symbol eg the UP & DOWN arrow keys or one of the F3 to F12 keys - it varies depends upon the model of the laptop.
If you cannot vary the brightness of the LCD screen the you have a faulty backlight.

Connect an external monitor to the laptop and power it up, if you see a clear image on an external monitor, this means your video card is OK.

If you see a dim image or flicking image on the LCD screen it means you have a backlight problem.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

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If you see a dim image on the LCD screen it means you have a backlight problem.
Connect an external monitor to the laptop and power it up, if you see a clear image on an external monitor, this means your video card is OK.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

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1 Answer

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try function key for lcd it may be in presetaiton mode by mistake
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