T410 - LED backlight turns off as soon its plugged in and battery threshold warning pops up

Situation:
my T410 with i7 and dedicated NS31000 runs on the 9cell battery.
So now I run out of juice and Win7 shows the warning "10% left yadayada...plug in"
So now I wait until it is at 9% and plug in the power.
What then happens is: the LED backlight of the screen turns off.
You can see the pictures etc on the screen, just w/o the backlight.
Of course you think the backlight is at 0, so you try to crank it up and you can see the bar,
but it is the actual backlight which is turned off.
It is not dimmed.
Sending the laptop to sleep, hibernation or rebooting it turns the backlight on again.
Can anyone check and try to replicate this?
AS OF 11/11/11: the issue still exists: http://youtu.be/zC-KdJQiW0w
4th repair and still not fixed!!!
Solved!
Go to Solution.

I can assure you that Lenovo support is excellent. It's handled by the same original IBM division in Atlanta Georgia. They are there for you 24/7 every day. I would not hesitate to give them a call, as it's also beneficial for them to hear from you. If it's not reported, they won't be aware of it. Many things like this do not show up in the very extensive testing that Lenovo does before releasing a new model. Therefore we are helping them by reporting these issues. Please let us know the outcome of your call....

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T410 - LED backlight turns off as soon its plugged in and battery threshold warning pops up

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