NUC7i5DN HDMI port 1 screen won't start up on cold start

Cossacs · ‎07-05-2022

Hello!

I've made dozens of devices, all of which have NUC7i5DN with three screens: two HDMI screens and one eDP screen. There is a problem with one of the devices.

The HDMI screen connected to port 1 of the NUC7i5DN of this particular device does not work on first start. The splash logo on this screen is not displayed during the first boot. The screen shows that there is no incoming HDMI signal.

All screens and NUCs share a common power that is supplied at the same time. The NUC starts up by programmatically pressing the Power button 2.5 seconds after power is applied.

If I don't reboot the NUC and try to hot plug another HDMI screen or any HDMI TV into port 1, it doesn't show up. Anything connected to HDMI port 1 is missing in Windows 10 display configuration until reboot. After restarting the NUC, everything works correctly.

If I swap the screens, then the problem is only with the screen that is connected to HDMI port 1. There is no such problem with HDMI port 2.

I tried to assign the main and second screens in the BIOS automatically and manually, disabled HDMI CEC, update firmware etc.- nothing helps.

That is, after a day of inactivity and a cold start NUC7i5DN HDMI port 1 is absolutely inoperative, until the first reboot.

My other devices that have same NUC7i5DN model and exactly the same HDMI displays don't have this problem.

What can be done to solve this problem?

HDMI firmware 1.79.1.1 on both ports

NUC firmware 0075 (DNKBLi5b.86A.0075.2021.1014.1327)

NUC7i5DNB

BTDN84700AZW AA J57626-509

DeividA_Intel · ‎07-06-2022

Hello Cossacs,

Thank you for posting on the Intel® communities. I am sorry to know that you are having issues with your Intel® NUC Board NUC7i5DNBE.

In order to better assist you, please try the following:

1. Did you perform full customization to the NUCs?

2. Did all the NUCs present this issue out of the box or was it after a system update?

3. How many devices are affected?

4. Do you have only the NUC board or the whole unit?

5. Did you try different HDMI cables?

6. Are you using a straight connection or are you using adapters?

Regards,

Deivid A.

Intel Customer Support Technician

Cossacs · ‎07-06-2022

Hello Deivid,

1) The only customization that has been done is the boot splash logo. I use the same bio file for all NUCs.

[Updated] this particular unit is brand new NUC.

2) It's hard to say

Since the problem only appears after a downtime of at least 1 day. While I was setting up the device equipment, this problem was not observed, but I could simply not pay attention. The problem was definitely with firmware 1.72 of HDMI ports and stays with 1.79. As for the bios firmware, whether there was a problem before updating to version 0075, I don't remember.

3) Only one device

4) Only NUC board

5) Yes

Display 1 and Display 2 are connected with different HDMI cables of different lengths and different manufacturers. I swapped these connections which means Display 1 with Cable 1 now connected to HDMI port 2 and vice versa, only the Display connected to HDMI port 1 does not work. Other devices use the same cables, there were no problems with them.

6) Straight connection.

At the input of each display there is an HDMI/LVDS converter based on the RTD266x chip with one HDMI input. I am using the same RTD266x board with the same firmware and EDID for all display modules. Display connected to NUC HDMI port 1 clearly indicates that it is not seeing an input signal from the only HDMI input.

I also checked the battery voltage (3.03V) and pulled it out for an hour and connected it again, no change.

Regards,

Sergiy

DeividA_Intel · ‎07-07-2022

Hello Cossacs,

Thanks for the information provided. In order to continue further, please try the following:

1. Perform a clean installation of the Intel graphics driver:

2. As a test, try a BIOS recovery:

BIOS: https://www.intel.com/content/www/us/en/download/19138/bios-update-dnkbli5v.html
Steps: (BIOS Recovery using the Power Button Menu) See attachment

Regards,

Deivid A.

Intel Customer Support Technician

DeividA_Intel · ‎07-11-2022

Hello Cossacs,

I reviewed your post, please let me know if the issue was resolved, if not, do not hesitate, just reply back.

Regards,

Deivid A.

Intel Customer Support Technician

DeividA_Intel · ‎07-13-2022

Hello Cossacs,

We have not heard back from you, so we will close this inquiry. If you need further assistance or if you have additional questions, please create a new thread and we will gladly assist you.

Regards,

Deivid A.

Intel Customer Support Technician