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Monitor very dim (unreadable) half of the times when laptop turned on.

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  • maddmike71 May 11, 2010

    on battery or ac power? it might be your power settings, look for the battery icon down by the clock, right click it and edit the brightness in the power options.

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  • 34 Answers

There is a problem on back light inverter or open inductor coil for supply of inverter transformer.i have encountered already for that problem.

Posted on Aug 01, 2009

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HI, i have sony vaio laptop. few months ago i face the problem that my computer LCD light. after starting 2 or 3 times it show the screen. it is running every time. i can see dim screen but after 3 or 4...


Hi there,

In your situation, you have the possibility of several different problems.

1. Your "Screen Inverter" is failing.
2. Your screen "LCD Panel" is failing
3. The "Video Controller Chip" soldered permanently to your motherboard is failing.

The first step in troubleshooting these problems would be to take your laptop to a friend's house who is using a desktop computer with a separate external monitor. Hook your laptop up to the external monitor and see if it displays normally on that monitor. If it does, you merely need to replace both the Screen Inverter and LCD Panel of your laptop and you'll be fine.

If, however, your laptop will not display on an exterior monitor, it means that your video controller on your motherboard has failed and you'll have to either get a new motherboard installed or consider replacing your laptop.

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Sounds like your inverter or your backlight is failing. The inverter is an easy repair, the backlight can be replaced but it involves taking the LCD panel apart, The backlight comes installed on new screens. I can include a service manual below and possibly a generic guide to backlight replacement....

http://support.dell.com/support/edocs/systems/latd505/sm/display.htm#1052500

http://www.laptoprepair101.com/laptop/2007/01/31/replace-screen-inverter-fix-backlight/

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Thanks please rate.

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