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laptop lcd dim


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#1 savagerose

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Posted 28 March 2009 - 07:09 PM

Hello,
I have a thinkpad laptop running windows vista. The lcd screen is so dim that you cannot see anything unless you hold a flashlight on it. I replaced the lcd screen but it is doing the same thing. I know the next thing to change would be the inverter, but when i hooked an external monitor to the vga, it lit for about 2 seconds then went back to flashing yellow as if no pc was hooked up. I don't know if there is a bios setting to make the external vga work or not as this is not my laptop, but a friends and with the lcd blackened, i cannot see enough to check the bios for the external vga. Was just wondering if any techie knew if this would be the inverter or if it goes deeper and is the video card on the laptop motherboard

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#2 fairjoeblue

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Posted 28 March 2009 - 11:08 PM

In addition to t6he power inverter laptop screen have aq backlight.
Usually if you can shine a flashlight on the screen & see a faint display it indicates the backlight has failed.
If the power inverter were bad you wouldn't be able to see anything.
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#3 dpunisher

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Posted 28 March 2009 - 11:19 PM

If the power inverter were bad you wouldn't be able to see anything.


Nope. A bad inverter and a toasted bulb have the same symptoms.

What model notebook?

Edited by dpunisher, 28 March 2009 - 11:21 PM.

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#4 fairjoeblue

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Posted 28 March 2009 - 11:25 PM

"Nope. A bad inverter and a toasted bulb have the same symptoms."

You are correct.
I mis-spoke.
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#5 savagerose

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Posted 03 April 2009 - 04:51 PM

well its definately not the inverter as i replaced it and it is doing the same it is a ibm lenova r61 14.1" screen. I tried to hook an external monitor to it and am not getting anything on it either so I am beginning to think perhaps it is the onboard video on the motherboard now. Any suggestions as if this is the problem?




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