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jacky301
Paper Tape
Posts: 4
Registered: ‎10-24-2013
Location: Hong Kong
Views: 12,937
Message 81 of 101

Re: s405/s400 screen brightness issue after downgrading to windows 7

Would you tell me where to download the S300 BIOS to fix the brightness of WIndows 7 ?

 

BIOS of S300 support i5-3337u CPU ?

enfortel
Paper Tape
Posts: 5
Registered: ‎10-26-2013
Location: Brazil
Views: 12,918
Message 82 of 101

Re: s405/s400 screen brightness issue after downgrading to windows 7

Hi.. here is the link to update BIOS to improve brightness on Win7.. http://www.4shared.com/rar/6VSoPJm-/BIOS_S400u_6dcn96ww.html
I just tested on win7, no garantes to work fine on win8..
This bios is for S300 but works fine on my S400u with Core i5 3317U..
I hope yours problems be solved, just like mine..

PS. I'm brazillian, sorry my bad english.. an I feel FEAR when upgrading.. but everything works fine.. Good Luck to everybody..
jacky301
Paper Tape
Posts: 4
Registered: ‎10-24-2013
Location: Hong Kong
Views: 12,884
Message 83 of 101

Re: s405/s400 screen brightness issue after downgrading to windows 7

Hi Enfortel,

 

I succsssfully installed BIOS_S400u_6dcn96ww.

 

After upgrade the BIOS and installed Windows 7, it need to install Intel Video driver.

 

Then the brightness is fixed.

 

Thanks Much.

 

I only say the Lenovo Support is very poor.

lastwitness
What's DOS?
Posts: 1
Registered: ‎11-08-2013
Location: Germany
Views: 12,711
Message 84 of 101

Re: s405/s400 screen brightness issue after downgrading to windows 7

hey guys,

 

first i installed the software update on my S400 Win8 laptop.

but i can't enter bios anymore :-/

--> Fn-Button and F2 doesn't work.

 

does anyone know, how i can enter bios now?

does the software change the key combination or something like that?

 

Thank u

jacky301
Paper Tape
Posts: 4
Registered: ‎10-24-2013
Location: Hong Kong
Views: 12,696
Message 85 of 101

Re: s405/s400 screen brightness issue after downgrading to windows 7

Do u press the button of Nova Button (the edge of top left) to power on and enter bios ?

 

Nova Button

When the computer is off, press this button to start the Lenovo OneKey
Recovery system or the BIOS setup utility, or to enter the boot menu.

nova button.PNG

enfortel
Paper Tape
Posts: 5
Registered: ‎10-26-2013
Location: Brazil
Views: 12,680
Message 86 of 101

Re: s405/s400 screen brightness issue after downgrading to windows 7

Well, you can try all combinations possible.. like F10, fn+F10, ESC, F11, F12, fn+F11, fn+F12, F9, Shft+F2... I have no problens after upgrade to enterr on bios.. but I made the process to upgrade in win7, not in win8.. 

 

You can try remove the battery and power chord for a fews minutes and try again.. 

jacky301
Paper Tape
Posts: 4
Registered: ‎10-24-2013
Location: Hong Kong
Views: 12,660
Message 87 of 101

Re: s405/s400 screen brightness issue after downgrading to windows 7

I am using windows 8 to upgrade firmware.
It has no problem.

After you upgraded the BIOS, you have to check BOOT option.

Boot Mode: Legacy Support
Boot Priority: Legacy First

You can enter the BIOS ?
arimo
What's DOS?
Posts: 2
Registered: ‎05-07-2013
Location: Bolivia
Views: 12,543
Message 88 of 101

Re: s405/s400 screen brightness issue after downgrading to windows 7

Does any of you have a S405???

hydeNY
Serial Port
Posts: 46
Registered: ‎08-15-2011
Location: US
Views: 12,536
Message 89 of 101

Re: s405/s400 screen brightness issue after downgrading to windows 7


@ToanNgn wrote:

So I just updated to Windows 8.1 and the brightness problem is still a problem. Lenovo even went ahead and updated their drivers to 8.1 yet they can't even fix the brightness issue?

 

Well it looks like there was a bios update which I already had flashed before, but that only fixes the Windows 7 issue. Guess I may have to revert back to Windows 8 or something. 

 

Update: I figured out what the problem was. I installed the latest Lenovo AMD drivers for windows 8.1 and that was what caused the brightness control to stop working. I reinstalled the Windows 8 one and its working again.




 

 

Wait, you mean you went back DOWN to Windows 8.0?

I have the same problem, I think S405 works ONLY with Windows 8.0 is that it? I just upgraded to 8.1 because wifi card was not behaving properly in 8.0 and nothing I tried was able to correct the issue, so It seemed like 8.1 was the only way to fix it.

 

Now the screen is fixed dim, cannot adjust brightness at all.

Please tell me if you were able to fix the brightness issue?

 

EDIT:

http://download.lenovo.com/consumer/mobiles/avga139w81a.exe

This fixed the issue on 8.1

• X220, Intel i5 2540M, 12.5 IPS, BT, FP • S405, AMD A6-4455M •T450S i5-5300U, 12 GB, IPS, BT
The-ITGuy
What's DOS?
Posts: 1
Registered: ‎12-17-2013
Location: United States
Views: 12,223
Message 90 of 101

Re: s405/s400 screen brightness issue after downgrading to windows 7

THANK YOU, Enfortel!!!!  Worked like a charm!  Was leary (don't know the Portugese for that word), about downloading and the signup requirement...worried about virus or some such BS.

 

Nice and bright again!  YES!

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