Satellite U400 - can't change brightness after reconstruction

Had a problem with my laptop in December, which gave rise to a new backlight and Ribbon being installed on the back. Wouldn't power for me after that so I had to me TI usinf rebuilt recovery disks :-(

Since then, although everything seems to work fine I can't adjust the brightness of the display. FN F6/F7 does nothing - even if the bar goes up and down that the brightness of the display does not change. Have been in the power management options, and once again although I can change the settings it the display does not change. I set at full intensity when the power and about 25 percent when it is on laptop battery, but there is no difference, no matter what source of energy that I use.

I'm running Vista 32 bit

Have updated my BIOS to V5.00 (26/10/10)
Check my display adapter is running on the latest driver
Download and install the latest chipset utility
Download and install PVAT

Someone at - it suggestions - the lack of brightness gives me shocking eyestrain

Thank you very much


> FN F6/F7 does nothing - even if the bar goes up and down that the brightness of the display does not change

If you see the bar moving left and right using the FN or FN + F6, F7 then this means that the executed software ok and has been installed properly.

Maybe the problem is not related to the software, but the parts that have been replaced by ASP. As you said the backlight and reversed tape have been replaced and I think something can go wrong when replacing.
Maybe the technician made a mistake

But please check it;
Need BIOS and the BIOS by default.
Save the changes and restart the device.
Then try again to change the brightness.
If you do not succeed, then I recommend requesting the ASP to check this

Tags: Toshiba

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