Screen may be locked by Windows key + "L" or when screensaver activates with password protection option enabled. Pressing Fn+F3 should still blank the screen, but this fails on some systems.

The following ThinkPad systems running Microsoft Windows XP and Windows Vista maybe affected by this symptom

• ThinkPad Reserve Edition
• ThinkPad R51e, R52
• ThinkPad R60, R60e, R61, R61e, R61i
• ThinkPad R400, R500
• ThinkPad SL300, SL400, SL500
• ThinkPad T400, T500
• ThinkPad T43, T43p
• ThinkPad T60, T60p, T61, T61p
• ThinkPad W500, W700
• ThinkPad X32
• ThinkPad X40, X41, X41 Tablet
• ThinkPad X60, X60s, X60 Tablet, X61, X61s, X61 Tablet
• ThinkPad X200, X200s, X200 Tablet, X300, X301
• ThinkPad Z60m, Z60t, Z61e, Z61m, Z61p, Z61t
  

Click here to download and install Power Manager for Windows Vista , Version: 2.37 Release Date: 2008/12/01 or later for Windows Vista.

Click here to download and install Power Manager for Windows XP, 2000 Version: 1.47 Release Date: 2008/09/29 or later for Windows XP or 2000.