06-29-2012 04:38 PM - edited 06-29-2012 04:40 PM
I have the lenovo IdeaPad Z575 (12992PU):
AMD Raedon HD 6520G IGPU
AMD Raedon HD 6650M 1GB
6GB DDR3 Memory
500GB 5400rpm HDD
Windows 7 Premium 64-Bit
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.
Solved! Go to Solution.
07-10-2012 05:41 PM - edited 07-10-2012 05:42 PM
there's a bios update at the download page. did you try to update it?
07-11-2012 02:58 AM
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!
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.
07-11-2012 03:33 AM
Try updating the Bios and display drivers to resolve
Hope This Helps
07-11-2012 04:45 PM
07-12-2012 02:17 AM
Also, not using sleep or hibernate is kind of avoiding the problem.
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 !
07-12-2012 11:06 AM
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:
Thanks. I hope Lenovo can get out some fix, or bettery yet, Microsoft.
08-09-2012 07:33 PM
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.