in ThinkPad: T400 / T500 and newer T series Laptops https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T-series-Laptops/T420s-remains-in-sleep-mode-when-I-use-F4-to-put-in-sleep-mode-after-fan-replacement/m-p/4437196 ThinkPad: T400 / T500 and newer T series Laptops topics Thu, 23 May 2019 21:26:59 +0000 tp01_en <![CDATA[ ]]> https://forums.lenovo.com/topic/findpost/1300/4437196/4437196 I just had the fan replaced, and now when I use F4 to put the laptop in sleep mode and then close the lid, it remains in sleep mode when I open the lid.  Same thing occurs when I close the lid (no F4) for sleep mode and then open the lid. 

 

However, when I select Sleep on the Windows ]]> Thu, 23 May 2019 21:26:59 +0000 https://forums.lenovo.com/topic/findpost/1300/4437196/4437196 JeffAK