Question about Toshiba Satellite A135-S2246 Notebook

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Need help Im trying to connect a external montior to my labtop and the external montior is saying no signal. The labtop back lite is really dim. What can I do

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  • Anonymous Mar 28, 2014

    im trying to use ctrl+f2 to print preview on my labtop and all it does is dim the screen

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Some laptops need you to turn on the external montior conection in the bios

Posted on Oct 28, 2008

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I replaced the monitor on this labtop, but when I turn it on the screen comes on but nothing else, tried it on a desktop screen and it's booting but not on the labtop, help


You say you replaced the monitor. How did you do that? Did you just replace the screen? If so,the inverter is probably bad. Look really carefully at the screen when you start the computer--can you see the images but they are really dark? If so, then the backlight needs to be replaced.

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What operating system are you using? On laptops there are settings for when your using battery power that dims the screen to conserve battery power. This could be the problem in your case.

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Reloading or updating the graphics drivers might help.

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You most likely have a defective screen - a defective inverter or a CCFL lamp or simply the video cable needs reseating. After reseating the video cable and the problem is still there then :- 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 it up, 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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Are you sure the laptop is powering up?
Do you hear the laptop boot up and the hard drive spinning and the power LED is on when you connected the external monitor?
The monitor must be powered up before the laptop for the video info to switch video port automatically.
If the external monitor is blank then you can't make it work, your video card is faulty and it is not possible to replace as it is built-in on the motherboard. You could replace the motherboard but this may not be a cost effective solution,

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When you connext an external monitor to the laptop, power up the monitor then power up the laptop. The video infomation should automatically divert to the extermal monitor. You can toggle between the external monitor and the LCD screen by pressinf the blue Fn key + F7 key.
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