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Older Thinkpad laptop LCD goes out after 15-20 min, internal backlight, or power supply?


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#1 Rabbix

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Posted 24 November 2012 - 01:01 PM

Title says it all mostly.

Additionally:

The LCD does not go completely black, but I can still barely read the screen if I have the light on it jussssst right, which I believe is the backlight, and I further believe that is integrated with the LCD panel. I did notice that it has an easily replaceable power unit which is much cheaper, so I thought I would double check with you guys since I have only done a few Backlight jobs.

Thanks!

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#2 dc3

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Posted 24 November 2012 - 02:06 PM

By power supply, are you referring to the AC adapter that plugs into a wall receptacle?

If you are, then no, this wouldn't be the problem. Either the battery, if it holds a charge and is charged, will run the computer, or the adapter will run it. If the power is removed the computer will shut down and you will not be able to see the screen in the manner that you have described.

It sounds like the problem is either the back light or the inverter.

Edited by dc3, 24 November 2012 - 02:09 PM.

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#3 Rabbix

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Posted 24 November 2012 - 02:10 PM

oops, I did mean the inverter, the little board the LCD plugs into that is uncovered when you remove the screen bezel. half an inch wide, by maybe 4 inches long. Sorry

#4 dc3

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Posted 24 November 2012 - 02:36 PM

From what you have described it sounds like the backlight.

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