BOXNUC8I5BEH selfishly goes to sleep mode.

[ksasa7]

OS Windows 10 Pro

Memory DDR4-2400 SP008GBSFU240B02

SSD SP001TBP34A80M28

電源オプション（Power Option)

高パフォーマンス (Hi Performance)

休止状態、スリープ、ディスプレイの電源を切る時間は無効に設定​

(Sleep & Hibernate & Display off time is disable)

[Alberto_R_Intel]

ksasa7, Thank you for posting in the Intel® Communities Support.

Just to let you know, we only provide support in English language and currently, we are using a translation tool.

Which video port in the Intel® NUC are you using to connect it to the monitor?

What is the model of the monitor?

This problem is it recently, was it working fine before?

In order to try to fix this problem, we can try to install the latest BIOS version for the Intel® NUC Kit NUC8i5BEH using the F7 method, which is version 0071:

https://www.intel.com/content/www/us/en/support/articles/000005850/mini-pcs.html

https://downloadcenter.intel.com/download/28801/BIOS-Update-BECFL357-86A-?product=126148

Also, please make sure to install the latest Intel® Graphics driver version 25.20.100.6519 for your Intel® NUC:

https://downloadcenter.intel.com/download/28601/Intel-HD-Graphics-Driver-for-Windows-10-for-Intel-NUC?product=126148

Regards,

Alberto R.

Intel Customer Support Technician   

Under Contract to Intel Corporation

[ksasa7]

Hi Alberto.

Thank you for your response.

I use the HDMI port & USB Type-C port. (as Dual monitor)

My Monitors are both same model BenQ GW2470HL.

I use same monitor for another desktop pc,

but this problem does not occur.

I will try to install latest BIOS & graphic driver.

Regards.

[ksasa7]

Hi Alberto.

I have a one question​.

On this NUC, Is the "System unattended sleep timeout" function enabled?

This problem occurs about every 2 minutes.

[Alberto_R_Intel]

Hi ksasa7, You are very welcome, thank you very much for letting us know those details.

In reference to your question, the option of "System unattended sleep timeout" is not located in the BIOS of the Intel® NUC, it belongs to Windows* and you can always disable it by getting to the "Power Options" menu:

https://www.tenforums.com/tutorials/72133-add-system-unattended-sleep-timeout-power-options-windows.html

Please let us know the results of installing the latest Intel® HD Graphics driver and the latest BIOS version.

The content on the above site is not controlled by Intel®. This information is offered for your convenience and should not be viewed as an endorsement by Intel for the merchants or services offered there

Regards,

Alberto R.

Intel Customer Support Technician   

Under Contract to Intel Corporation

[ksasa7]

Hi Alberto.

Today, I tried the resolution you suggested (Update the BIOS & the Graphic Driver​),

but there was no improvement.

and

A strange pattern is displayed on the screen.​

(refer the image of the attached file)

Should I figured this problem is a initial failure of this product?

If so, I have to return this product to Amazon as soon as possible.

Regards​

[ksasa7]

posted a file.

[Alberto_R_Intel]

Hi ksasa7, thank you very much for letting us know those results and for sharing the picture.

Based on the fact that you already installed the latest Intel® Graphics driver: 25.20.100.6519, the latest BIOS version: 0071 and still after that the problem remains and now the Intel® NUC is showing that error message in the picture, it indicates that this could be a hardware problem with the Intel® NUC itself.

At this point and if you have the option, we recommend to get in contact directly with Amazon* as soon as possible, in order to replace the Intel® NUC since it might be defective.

Just to let you know, the Intel® NUC has 3 years of warranty, so if for some reason Amazon* is not capable to replace the unit for you, you can always get in contact directly with Intel® using the link below, so we can further assist you with the warranty replacement process:

https://supporttickets.intel.com/warrantyinfo?lang=en-US

Regards,

Alberto R.

Intel Customer Support Technician   

Under Contract to Intel Corporation

[ksasa7]

Hi Alberto.

Thank you for your opinion.

I returned the NUC to Amazon.

I hope the same problem occurs.

I appreciate your support.

Best Regards.​

[Alberto_R_Intel]

Hi ksasa7, You are very welcome, thank you for letting us know those updates.

Perfect, excellent, we are glad to hear that you were able to get in contact directly with Amazon* and they will replace the Intel® NUC for you.

The replacement Intel® NUC should work with no problems.

Any other inquiry, do not hesitate to contact us again.

Regards,

Alberto R.

Intel Customer Support Technician   

Under Contract to Intel Corporation