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When I use my toshiba laptop with battery the screen is perfect but when I plug it to the AC outlet the screen become dark. What I need to check?

You might have reduced the screen brightness on AC power in the power management settings. Does the laptop work otherwise on AC? it starts on the left and the longer i use it the darker it gets. as i write this i cant see the screen ii am holding it up to the window to see it.... by the way this lap top is less than 2 years old and the first time i had this problem it was just out of warranty .i have had 3 invertrs replaced so far, getting to be pain cos the time scale of use is very short indeed, approx 10 hours of use between changing

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  • irish skin Jan 26, 2009

    I understand whts happening regards to the inverter but i dont understand why its continusily happening some one mentioned that there could be a programme conflict so i got vista removed and xp put backii but its still ongoing. are you guys aware of programme conflicts ? does it sound like this and can it be solved? PERMENANTLY.....

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If I get what your saying, the bulb is getting dimmer as you use it. Almost all of the laptops I have worked on with what your describing it is an inverter or a bulb. If it has dark on the sides and then goes dark it may be the bulb going bad which can make the inverter go bad. Just like having bad bulbs in a flourecent light can make the ballast bad.
I would get an inverter from ebay and install it. Its really pretty easy to change (normally). I see you had this done under warranty before. If you dont know how to do this I can tell you how. Get the inverter first and a small screwdriver set then if you need help I posted a description to another persons question and told them how to change the bulb. You should be able to get the idea about the inverter swap from that post or contact me. Hope this helps... Dale

Posted on Jan 24, 2009

  • Dale Barrett
    Dale Barrett Sep 09, 2009

    Did you ever find a complete solution for your issue? Was it a problem with the light in the LCD going bad? I know its a long time after the last post. I was just wondering. I have also come across a couple more Toshibas with a similar problem in the last 8 months. I would check around on your specific model Number.

    I hope you got your problem fixed and didnt have it happen again.

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