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NUC's ring LED goes red

VietNguyen
Novice
838 Views

Hello,

I have a NUC7i5BNH. Recently the fan noise was too much so I opened the NUC to remove dust from the fan. After that I turned the NUC back on, everything (the fan, SSD, RAM, Wifi...) still works but now the ring LED goes red color, even when the NUC is not turned on (normally it's in blue color and when the NUC is off then it should be off as well). I captured a video of it here:

https://imgur.com/O8djnfM

 

Here is a picture of the ring LED's cable in the board: https://imgur.com/zDbZo1x . I think I plugged it in correctly. So far I've tried to remove/switching RAM/SSD or plug the NUC into different outlet in the house but that didn't help.

 

So can anybody tell me what is happening please?

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1 Solution
LeonWaksman
Super User
694 Views

Hi @VietNguyen 

The ring LED is fed from Front Panel LED ring connector. See item "C" on fig. 12, page 46 in Technical Product Specification.  The cable consists of 4 wires: 5VDC and three wires for color control - Red LED, Green LED and Blue LED. See Table 19, page 50 in the Technical Product Specification.

Please check if the connector is fully connected, if the contacts are clean and not skewed and if all three color controlling wires are connected.

 

Leon

 

 

 

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8 Replies
LeonWaksman
Super User
810 Views

Hi @VietNguyen 

1. Power ON your NUC and while you see the Intel NUC logo, repeatedly click on F2 to enter BIOS settings. 

2. While in BIOS, click on F9, followed by "Y" to set BIOS to default settings.

3. Click on F10 followed by "Y" to save settings and exit to Windows.

4. Check the ring color.

 

Leon

 

VietNguyen
Novice
805 Views

Hello, I tried that but the issue is still not solved. The ring LED color is still red, even if the NUC is shut down. I tried to change the ring LED from power state indicator to HDD activity to SW control but nothing changed too.

ClariceStarling
Valued Contributor II
786 Views

That's so cool ... why would you want to change it?

VietNguyen
Novice
765 Views

Your comment made me laugh sir. Actually I'm just a normal user, so seeing that light turning from blue to red made me panicked that I might have done something stupid when I was opening the NUC. That's why I want to change it back to the way it was.

n_scott_pearson
Super User Retired Employee
721 Views
I believe that you can choose the color from BIOS Setup. Have you checked the settings?
...S
VietNguyen
Novice
717 Views

Yes, I tried that too but that didn't help. All the time I didn't changed any settings related to this LED, I even reset the BIOS settings to default as suggested by Leon. 

LeonWaksman
Super User
695 Views

Hi @VietNguyen 

The ring LED is fed from Front Panel LED ring connector. See item "C" on fig. 12, page 46 in Technical Product Specification.  The cable consists of 4 wires: 5VDC and three wires for color control - Red LED, Green LED and Blue LED. See Table 19, page 50 in the Technical Product Specification.

Please check if the connector is fully connected, if the contacts are clean and not skewed and if all three color controlling wires are connected.

 

Leon

 

 

 

VietNguyen
Novice
646 Views

Hello @LeonWaksman , I feel so glad that I asked here first. My issue is now solved, the reason is that I misplaced the ring LED connector to the CEC header. Thank you very much for your help.

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