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When my W500 is on battery power and idle for 3 minutes the screen will flicker once then when I press a key it will blank briefly again before I can continue using the system.  It turns out that there is a power saving feature that is causing this .  The  battery power default setting is to adjust the refresh rate to 50Hz after three minutes idle.

 

To change this:

 

 

  • Open the  Control Panel  and select -> Power Options 

 

  • Select Power Manager tab then click "Launch Power Manager"

 

  • In the "Power Manager" click the "Power Schemes" tab

 

  • Next, press the "edit" button to edit the currently selected scheme
  • (or whichever one you want to remove flicker from)

 

  • Press the "Next" button

 

  • Finally, click "Lower display refresh rate" under battery settings and select "NEVER"

 

 

 

 

 

 

 

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