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5 Posts

06-22-2018

MX

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LSB & support unable to recognize Yoga 15 after BIOS update ++

2018-06-29, 7:13 AM

I have a Yoga 15 (20DQ). After a BIOS update about a month ago I am encountering many issues.

 

1) Lenovo no longer recognizes the machine for updates and support.

2) Backlit keyboard does not function correctly (F keys / hotkeys / backlight / Fn / Ctrl are not configured correctly)

3) Touchpad will work in BIOS but not in windows.

4) Splash screen is NEC and no longer Lenovo. (motherboard?)

5) Model and Serial are incorrect in the system.

 

I have flashed to earlier versions of BIOS and this has not resolved.

Before factory recovery I set to defaults. (obviously unsuccessfully)

I have factory recovered with fresh install.

 

Question: Is there a mechanical switch that would hang and make the keyboard and touchpad inoperable? 

 

Im scratching my head... looking for solutions... Please help.

 

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409 Posts

03-03-2017

JP

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Re: LSB & support unable to recognize Yoga 15 after BIOS update ++

2018-06-29, 11:50 AM

Dear customer,

Can you advise us below information in BIOS Setup ?

  - UEFI BIOS Version

  - UEFI BIOS Date

  - Machine Type Model

 

No need to capture System Serial number, System board serial number.

 

To enter the BIOS Setup, press F1 during "NEC" logo is displayed?  In case F1 key doesn't work to enter BIOS Setup, please use F2 key instead.

 

 

 

 

 

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5 Posts

06-22-2018

MX

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Re: LSB & support unable to recognize Yoga 15 after BIOS update ++

2018-06-29, 22:14 PM

I had flashed to 1.29 and thats when the issue occured. As you can see I flashed back to 1.26 and the issue is still obvious. 

 

 

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5 Posts

06-22-2018

MX

8 Signins

153 Page Views

  • Posts: 5
  • Registered: ‎06-22-2018
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  • Message 4 of 6

Re: LSB & support unable to recognize Yoga 15 after BIOS update ++

2018-06-29, 22:17 PM

One interesting thing that I learned today. If laptop goes into sleep mode most of the hardware functionality of the keyboard starts to work again (ie; volume, brightness, backlight). Unfortunately touchpad is still inoperable.

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5 Posts

06-22-2018

MX

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  • Posts: 5
  • Registered: ‎06-22-2018
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  • Views: 153
  • Message 5 of 6

Re: LSB & support unable to recognize Yoga 15 after BIOS update ++

2018-06-29, 22:52 PM

Model: Yoga 15

 

Moderator note: image containing serial number removed to prevent abuse.   For reference, MT-M in image is 20D0-001KUS.

 

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409 Posts

03-03-2017

JP

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Re: LSB & support unable to recognize Yoga 15 after BIOS update ++

2018-07-04, 1:54 AM

Dear customer,

As I confirmed with Yog 15 development engineer, it seems the system power switch subcard might be broken and as the result system behaves as NEC PC model.

I'd like customer to contact Lenovo Service for repaire.

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