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Netname
Paper Tape
Posts: 12
Registered: ‎06-29-2012
Location: United States
Views: 4,172
Message 1 of 10

Backlight is off when laptop is woken up from sleep

I have the lenovo IdeaPad Z575 (12992PU):

AMD A6-3420M

AMD Raedon HD 6520G IGPU

AMD Raedon HD 6650M 1GB

6GB DDR3 Memory

500GB 5400rpm HDD

Windows 7 Premium 64-Bit

 

Problem:

This happens sometimes, but after I put the laptop to sleep several times during the same day, sometimes the display's backlighting will not turn on when I wake the laptop from sleep. I know only the backlight is off because I can see everything I left on the screen before I put it to sleep with very bright light source (flashlight or desk lamp).

 

What I Have Tried:

I have tried turning up the brightness (does not work).

I have tried pressing FN+F2 (which is the turn off backlight key) (does not work).

I have tried restarting the computer (this works, but I hope that this is no the only solution).

 

Note, this laptop is only 1-2 weeks old. Thanks for any help.

Netname
Paper Tape
Posts: 12
Registered: ‎06-29-2012
Location: United States
Views: 4,144
Message 2 of 10

Re: Backlight is off when laptop is woken up from sleep

Bump. Any help please?

Re-boot is the only solution, but I don't want to keep doing that.
Retired Moderator
Retired Moderator
Posts: 13,719
Registered: ‎12-07-2009
Location: CZ
Views: 4,141
Message 3 of 10

Re: Backlight is off when laptop is woken up from sleep

hi netname,

there's a bios update at the download page. did you try to update it?

http://consumersupport.lenovo.com/uk/en/DriversDownloads/drivers_show_5163.html


http://www.krasotaiskusstva.com
countrywise
Broadband 3G
Posts: 828
Registered: ‎04-14-2012
Location: İstanbul
Views: 4,131
Message 4 of 10

Re: Backlight is off when laptop is woken up from sleep

See if Yiğit's suggestion solves the problem,

 

if it doesn't ,i have a sure fire advice that will fix this once and for all.

 

Disable   the sleep option!

 

That's it!

 

Hibernate/sleep options on laptops are notorious for contributing to a number of problems,

 

among the first things i do,when i get a lappy,

 

is to do the above.

Retired Support Specialist
Posts: 1,241
Registered: ‎11-02-2011
Location: India
Views: 4,128
Message 5 of 10

Re: Backlight is off when laptop is woken up from sleep

Hi

 

 

Try updating the Bios  and  display drivers  to resolve

 

http://consumersupport.lenovo.com/us/en/DriversDownloads/drivers_show_5163.html

 

http://consumersupport.lenovo.com/us/en/DriversDownloads/drivers_show_4923.html

 

 

Hope This Helps

Cheers!!!

Netname
Paper Tape
Posts: 12
Registered: ‎06-29-2012
Location: United States
Views: 4,116
Message 6 of 10

Re: Backlight is off when laptop is woken up from sleep

I already have the latest BIOS and display drivers, but it keeps happening. It does not happen every single time, but once in a while. Still annoying.

Also, not using sleep or hibernate is kind of avoiding the problem.
countrywise
Broadband 3G
Posts: 828
Registered: ‎04-14-2012
Location: İstanbul
Views: 4,111
Message 7 of 10

Re: Backlight is off when laptop is woken up from sleep


@Netname wrote:

Also, not using sleep or hibernate is kind of avoiding the problem.

NO,using hibernate/sleep

 

İS THE PROBLEM!!!

 

Windows has never handled  these functions

 

in laptops very well at all.

 

İn desktops yes,but not laptops.

 

So with these functions enabled,

 

you're more likely to run into problems,

 

and that's a fact !

Netname
Paper Tape
Posts: 12
Registered: ‎06-29-2012
Location: United States
Views: 4,107
Message 8 of 10

Re: Backlight is off when laptop is woken up from sleep

Hmm, it seems as though you might be right, countrywise. I googled the problem and many Windows 7 users seem to experience this issue.

 

This article shows some light on the problem, and some temporary fixes, although not always the solution:

http://social.technet.microsoft.com/Forums/en-US/w7itprohardware/thread/08a3eb1d-b698-4639-af4b-5278...

 

Thanks. I hope Lenovo can get out some fix, or bettery yet, Microsoft.

countrywise
Broadband 3G
Posts: 828
Registered: ‎04-14-2012
Location: İstanbul
Views: 4,065
Message 9 of 10

Re: Backlight is off when laptop is woken up from sleep

Yeah i do hope that as well,

 

and yes this is not a Lenovo problem.

 

and not just the  W.7 OS either.

 

 M/soft  needs to  fiix this,

 

 

Aerodamus
Fanfold Paper
Posts: 11
Registered: ‎04-19-2012
Location: United States
Views: 3,837
Message 10 of 10

Re: Backlight is off when laptop is woken up from sleep

I have the same laptop as you, and I have a solution to the problem, but it only works if you're using a mouse, not the touchpad. I used to have this same problem, but when I wake the computer from sleep while the screen is closed (with this mouse obviously) and wait for it to wake up before opening the screen, it seems to solve the issue. 

 

Turning off the sleep function is 140% not an option unless you have a SSD, otherwise it's an unbearable problem to wait 60 seconds or more when you want to use your laptop.

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