05-23-2019 02:26 PM
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 7 Start Menu and close the lid, the laptop does resume when I open the lid.
- Before replacing the fan, I used F4 for sleep and resume, because when I close the lid I would sometimes find the fan running the next morning
- BIOS is up-to-date
- Keyboard and mouse are set to wake PC
- Power Options Settings:
- Allow hybrid sleep set to OFF and Hibernate set to NEVER (As they always have been)
- USB Settings > Disabled USB selective suspend settings (These were enabled)
While this isn't a huge problem, I would like to have things working as before, preferably without having to go back to the Lenovo certified shop.
Thank you in advance for your help.
05-24-2019 08:52 PM
Thank you for using the community forums.
Have you tried using the combination of Fn+F4 and check if it works? You can change the action of the Fn+F4 key combination by changing the settings in Power Manager. You can also refer in the Hardware Maintenance Manual for more info https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t420s_t420si_hmm_en_0a60241_07.pdf (Page 51).
Let us know the result.
05-26-2019 06:00 AM
Sorry I wasn't clear. I meant Fn+F4, that's what I was doing prior to fan replacement (it worked), and that's what now doesn't allow me to resume from sleep mode.
05-30-2019 09:17 AM
Page 61 of the hardware maintenance manual shows a list of fn key combinations: https://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles_pdf/t420s_t420si_hmm_en_0a60241_07.pdf.
Fn + F4 puts it to sleep and to put it back on normal operation you just need to press on the Fn key only without any function key.
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