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fudgestix
Paper Tape
Posts: 2
Registered: ‎04-08-2013
Location: United Kingdom
Views: 1,634
Message 1 of 3

Z500 Suddenly Can't Adjust Brightness Unless I Do it in BIOS

Hi, I'm hoping someone can help me.

 

Tonight, when I turned on my laptop the screen seemed much dimmer than usual (even at start up), and once it had loaded I couldn't change the brightness no matter what. I tried using the buttons on the keyboard, and manually in windows, but it remained dim. I also tried on different power settings, but still nothing.

 

I finally managed to turn it up by going into the BIOs and adjusting the brightness on that screen, but I still can't do anything once Windows 8 is loaded up.

 

It was fine last night before I shutdown, and there were no major updates and I installed nothing new. I tried doing a system restore, but the problem still remains.

 

Any ideas? I only got this 28 days ago, I really don't want to be having to send it away for repair already! 

 

Oh, it's a regular Z500 btw, not one of the Touch ones.

Social Support Agent
Social Support Agent
Posts: 5,824
Registered: ‎02-11-2012
Location: PH
Views: 1,593
Message 2 of 3

Re: Z500 Suddenly Can't Adjust Brightness Unless I Do it in BIOS

hi fudgestix,

 

Welcome to the Lenovo Forums

 

Can you try to:

1. Boot into the BIOS load the default settings by pressing F9 then press F10 to save and exit.

2. In Windows, try to press F11/F12 to toggle the brightness. If same issue, uninstall Lenovo Energy Management under Control Panel > Programs and test.

3. If all works well, try to reinstall the software below and observe:

 

Lenovo Energy Management for 64-bit Windows
em8.08.0.2.4.exe
45.4MB

 

 

Let me know your findings

 

Cheers



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fudgestix
Paper Tape
Posts: 2
Registered: ‎04-08-2013
Location: United Kingdom
Views: 1,575
Message 3 of 3

Re: Z500 Suddenly Can't Adjust Brightness Unless I Do it in BIOS

Hi, thanks for the reply. I actually ended up restoring factory settings after trying a bunch of stuff that didn't work, and it seems to have fixed the problem for now.

 

Still don't understand what caused it :s

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