01-06-2012 03:52 PM
Hi TinyRK, thank you for reporting this problem, I also have this since I bought my T410.
And, I also did not get this issue repaired by the onsite service, actually. My motherboard was also already changed
I also cofirm that this is not an OS problem and, for my T410, a thing of battery charge level, it also occurs when changing to power supply in BIOS mode, also with a high level of battery charge.
01-06-2012 03:54 PM
My T410 is now at Lenovo directly with actual engineers, not just technicians.
We'll see what happens next.
But I am seriously annoyed!
01-09-2012 05:57 AM - edited 01-09-2012 05:59 AM
Recently I had the same issue with a Lenovo T520 machine.
In my case,the problem was that Windows 7 automatically changed the refresh rate from 60HZ (on power) to 50HZ(on battery).
I solved the problem by editing the Windows7 power management for the Intel Graphics and changing the value from Balanced to Maximum Performance.
01-09-2012 06:02 AM
That only makes the screen look weird (washed out colors), but does not turn off the LED-Backlight.
And I have a dedicated nvidia-GPU, not the Intel GMA, so this is not related, i guess.
01-09-2012 06:18 AM - edited 01-09-2012 06:26 AM
I am sure that my T520 had the same yimptoms as in the movie on youtube.
I have an NVIDIA 240M with Optimus technology ,but when I tested the NVIDIA card wasn't used , only the Intel.
The test was simple:
- right click on Desktop,Properties->Monitor->Refresh Rate = 60HZ - on power
- unplug the power cord,the screen turn off,then on . Refresh Rate = 50HZ - on battery (the colors were the same)
- edit the power management settings,then retested - everything OK
The only difference in my case is that the screen turns on automatically .
01-17-2012 09:58 AM
On my T410, the error seems to be fixed.
The technician did an onsite service and swapped my display panel and display cable. Now the backlight is still on after plugging in.
01-31-2012 04:28 AM
After the awesome lenovo Squad Team (yes, there is such a thing )checked my T410, I will get it replaced.
I would have not accepted any other solution, since it took only 5 service-calls on this issue.
Anyways, thank you Lenovo and this is why I bought the 3-year accidental Thinpad yadayada insurance protection masterplan!
I will be happy once I have my new Thinkpad in my hand.
04-06-2012 05:38 AM - edited 04-09-2012 01:06 AM
I m having similar problem with T410s - no backlight no matter what I do. Changed display twice, motherboard once and LED cable once.
Is there a solution?