Question about IBM ThinkPad T20 2647 Notebook

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Thinkpad T20 display is very, very dark (unreadable). Does the display need to be replaced ?

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1. Test using an external monitor. If it works, then either the screen bulb or the inverter board might be defective.
2. Test the inverter. Easiest way to do it if you have a good screen with a good bulb. Connect the good screen to the inverter board & test it. If it lights up, then the inverter board is good. If it did not, then the inverter board is bad & needs to be replaced.
3. If the inverter board is good, then we are left with the possibility that the screen bulb is bad. To fix this, we will need to replace the LCD screen.

Posted on Oct 08, 2010

  • b_girard Oct 08, 2010

    I don't have another "good" screen. Any other options to check the inverter ?

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Usually, hitting the 'F7" button while holding down the 'Fn' button (function button) will brighten your screen.

Also, if you're running on battery, to conserve battery power, most notebooks will dim the screen... you can override those settings by going into the control panel and into the power settings (easiest found on the old 'classic view').

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