NUC6CAYH won't turn on after shutdown

[GTraj]

I am unable to start the NUC via the power button. This happens only after shutdown. It starts again only if I unplug the PSU from the wall and plug again.

After it starts runs fine. Installed Windows 10 pro. Updated the latest BIOS.

After Windows shutdown everything is fine and the led on the power button stays lit with amber color as it is supposed to do. But if I press the button nothing happens. It reacts since the led turns off when pressed. But the device will not turn on. The only way to force it to start is by unplugging from the wall an plugging again.

I deselected fast boot from Windows. I tried playing with all options in BIOS related to power but I am unable to resolve this issue.

If I press the power button while Windows is running, the device will shut down. So the button is working.

Any help is greatly appreciated.

[Trial-Member]

Have you tried witd disabled Hibernation?

• open cmd as admin
• type "powercfg -h off" (without "")
• press <enter>

[GTraj]

I just did. The problem remains.

[Trial-Member · Accepted solution]

I have a NUC6CAYS and I wonder ... havent realized that while reading your post for the first time.

You wrote ...

After Windows shutdown everything is fine and the led on the power button stays lit with amber color as it is supposed to do. But if I press the button nothing happens. It reacts since the led turns off when pressed. But the device will not turn on. The only way to force it to start is by unplugging from the wall an plugging again.

My NUC6 turns off after shut down. So all LED turn off. Pressing and holding the power button 4 seconds will turn off the NUC. Thats why the LED turns off in your case. But thats not the normal behavior. Normally the NUC turns off and will turn on when pressing (short time) the power button.

[GTraj]

Thank you. You just pointed me in the right direction. I thought it is normal for the power button to remain lit when the unit is off. This helped me solve the problem.

I got it working by putting a check mark on Deep S4/S5 sleep. Now the button led turns off when the NUC shuts down. I press it and it boots normally. I never touched this setting in BIOS because I thought that it can only make it worse for me to start the NUC again.

In BIOS I also now have selected Wake from S3/S5 sleep, with month, day and time set to 0. And if I shut down the unit with a press on the power button, it shuts down completely.

Problem is solved. Thank you so much.

Only one thing bothering me is that for two times in a row the date in bios is reset. This happens after I unplug the NUC from the wall. But maybe this happened because I held the power button pressed for 30 seconds.

Although this is a new unit, it may have dead RTC battery. I will replace it just in case.

Thank you so much.

[n_scott_pearson]

Be careful; some of the third-party batteries out there are wired backwards to what is required.

...S