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38 Posts

08-30-2018

Singapore

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Yoga S740 (14) restarting after shutting down

2019-12-02, 0:21 AM

I discovered this weird issue yesterday.

For some reason, whenever I am plugged into AC and when Bluetooth is on (I've tried with two different mice), whenever I shut down my PC soon after booting it up, the computer shuts down, and then proceeds to turn itself on again a second later. I have disabled all the wake to boot settings I can think of, disabled fast startup and even resetted the BIOS but same issue.

 

The problem doesn't manifest if:
- I am using the battery
- I turn off Bluetooth or
- I wait a minute or two before shutting down

 

It somehow seems that before the Bluetooth driver is loaded fully, something is causing the computer to restart instead of shutting down.

 

Does anyone else ever experience this issue?

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379 Posts

11-04-2019

Philippines

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Re: Yoga S740 (14) restarting after shutting down

2019-12-02, 16:23 PM

Hi ,

 

Regarding the issue, You can try to turn off Fast Startup feature under the power options as some reports say that Windows 10 may unexpectedly restart after you select the Shutdown option or put the system into Sleep or Hibernate mode. Here’s how to fix this issue.

 

According to numerous reports, turning off the Fast Startup feature helps fix the issue in most cases.

  1. Go to the Windows Settings > System > Power & Sleep > Additional power settings.
  2. Click Choose what the power button do, then click Change settings that are currently unavailable.
  3. Uncheck the Turn on fast startup feature.
  4. Save changes and shut down the PC to see if the issue has been fixed.

Hope this helps and let us know how it goes

 

Jeremy



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38 Posts

08-30-2018

Singapore

116 Signins

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  • Posts: 38
  • Registered: ‎08-30-2018
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  • Message 3 of 6

Re: Yoga S740 (14) restarting after shutting down

2019-12-02, 18:41 PM

Hi Jeremy,

 

As mentioned above I have already disabled fast startup. I have also disabled the auto restart upon crash setting.

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38 Posts

08-30-2018

Singapore

116 Signins

629 Page Views

  • Posts: 38
  • Registered: ‎08-30-2018
  • Location: Singapore
  • Views: 629
  • Message 4 of 6

Re: Yoga S740 (14) restarting after shutting down

2019-12-04, 0:24 AM

Ok, now, the funny thing is, when I enable fast startup, I have no issues at all.

 

I also realise that this problem only happens when WiFi or Bluetooth is enabled (so actually, even when Bluetooth is disabled, as long as my WiFi is connected it happens), and I do a "non-fast" shutdown within say, 3 minutes of turning on. When I shut down the computer before entering the login screen, it does not restart. Neither does it restart when I am on battery 

 

I suspect there is a bug somehwere but I can't figure out why. I've tried updating all the driver's but to no avail.

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28 Posts

10-09-2019

China

47 Signins

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Re: Yoga S740 (14) restarting after shutting down

2019-12-05, 2:36 AM

Hi trenzterra,

 

What's your BIOS version, and if your machine type is S740-14IIL?


If answered your question, please help to mark your topic as "Solved"! Thanks for your cooperation in advance!
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38 Posts

08-30-2018

Singapore

116 Signins

629 Page Views

  • Posts: 38
  • Registered: ‎08-30-2018
  • Location: Singapore
  • Views: 629
  • Message 6 of 6

Re: Yoga S740 (14) restarting after shutting down

2019-12-05, 17:56 PM

Hi there, my laptop version is S740-14IIL. I have updated BIOS to the latest version BYCN29WW. I am not sure if the previous version had this issue.

 

I also notice another weird bug when my power supply is plugged in:

 

- Basically, whenever I close the lid, and reopen it, or enter sleep mode and wake up, my display brightness is not honoured. E.g. I can set my display to minimum brightness, but when I enter sleep and wake from sleep, the screen brightness will increase by 3 to 4 steps automatically. It goes back to the correct minimum brightness only upon reboot, or when I manually toggle Fn+F11 once (to 'reset' it). Funny thing is, when I am using battery, the brightness setting works properly.

 

I feel that this laptop has quite a bit of bugs in it...

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