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ringmasterDarin
What's DOS?
Posts: 3
Registered: ‎04-13-2013
Location: Hawaii
Views: 113,974
Message 1 of 33

P400 Touch screen brightness won't adjust

First off, I see this seems to be a problem across all of your computers and has been for years... why isn't there a fix?

 

I used my brightness down button once and now it won't go back up. I can't adjust the settings at all, despite the graphic on the screen showing me the meter going up and down. I've checked all drivers, tried uninstalling and reinstalling lenovo energy management, and I've still got nothing. I've stopped short of a factory reset because that's super annoying having set everything up and then a couple weeks after purchase have to do it again. Any other alternatives first?

 

Suggestions?

ishaan
Bit Torrent
Posts: 3,304
Registered: ‎06-27-2012
Location: India
Views: 113,721
Message 2 of 33

Re: P400 Touch screen brightness won't adjust

Hi
Try using the intel graphics driver from lenovo site or from the d drive of your hard drive.
http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS031547
Ishaan Ideapad Y560(i3 330m), Hp Elitebook 8460p!(i5-2520M) Hp Pavilion n208tx(i5-4200u)
If you think a post helped you, then you can give Kudos to the post by pressing the Star on the left of the post. If you think a post solved your problem, then mark it as a solution so that others having the same problem can refer to it.
ringmasterDarin
What's DOS?
Posts: 3
Registered: ‎04-13-2013
Location: Hawaii
Views: 113,633
Message 3 of 33

Re: P400 Touch screen brightness won't adjust

Thank you! Apparently my update was more recent and caused problems. Thank you again! My eyes don't hurt so much trying to read the screen now!

ishaan
Bit Torrent
Posts: 3,304
Registered: ‎06-27-2012
Location: India
Views: 113,628
Message 4 of 33

Re: P400 Touch screen brightness won't adjust

Your welcome friend
Glad to know it worked
Ishaan Ideapad Y560(i3 330m), Hp Elitebook 8460p!(i5-2520M) Hp Pavilion n208tx(i5-4200u)
If you think a post helped you, then you can give Kudos to the post by pressing the Star on the left of the post. If you think a post solved your problem, then mark it as a solution so that others having the same problem can refer to it.
y2k4life
Blue Screen Again
Posts: 2
Registered: ‎05-07-2013
Location: usa
Views: 113,438
Message 5 of 33

Re: P400 Touch screen brightness won't adjust

This happened to me and I almost went to K-Mart to ship my pants.

 

There is a key combination that will make the screen go dim. I was in Internet Explorer and was using the CTRL + and - to adjust the zoom and CTRL 0 to return to normal. I think I hit some key combination and the screen went dim to almost dark. I can't reproduce the problem.

 

It took me a day and a half to figure out a solution without having to update software.

 

Here is a solution in case the drivers and/or the OS gets in the way again of adjusting the brightness. It is a pain and requires a reboot which removes the buggy software interfering with the brightness keys which allows you to make it brighter. I had to do it a couple of times due to hitting the key at the right time. Maybe going into BIOS would give you more time. I did not try that.

 

What I did was reboot and when I saw the Lenovo logo on boot up I hit the brightness key and watched the screen get brighter. When I saw that I almost had to go back to K-Mart because I could not believe how easy that was.

 

I still don't have brightness control, but I'm no longer having to squint my eyes to look at the screen or work in the dark. I'm going to get the drivers to see if that will fix the keys.

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y2k4life
Blue Screen Again
Posts: 2
Registered: ‎05-07-2013
Location: usa
Views: 113,418
Message 6 of 33

Re: P400 Touch screen brightness won't adjust

The drivers worked for me too. I just wish the ecosystem worked. Don't know why this was not a critical download and part of the Windows Update.

techeela
What's DOS?
Posts: 1
Registered: ‎06-15-2013
Location: Montreal
Views: 113,044
Message 7 of 33

Re: P400 Touch screen brightness won't adjust

Reinstalling the display driver solved the problem. It is a software glitch. Than you for the soluton.

ideapad-jd
What's DOS?
Posts: 1
Registered: ‎11-06-2013
Location: California
Views: 109,346
Message 8 of 33

Re: P400 Touch screen brightness won't adjust

The old driver solution worked for me, too. Brightness can be adjusted again

Kristyn12
What's DOS?
Posts: 1
Registered: ‎11-08-2013
Location: Canada
Views: 108,920
Message 9 of 33

Re: P400 Touch screen brightness won't adjust

thank you so much!!!! now i can get back to studying Smiley Happy

eglort
What's DOS?
Posts: 1
Registered: ‎12-02-2013
Location: Washington
Views: 106,275
Message 10 of 33

Re: P400 Touch screen brightness won't adjust

This doesnt seem to work for mine, is there anything else that I could do to fix it?

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