how to replace the battery of the real-time clock in NUC6CAYH ?

[MOver2]

Hi, I want to replace the rtc battery of a NUC6CAYH, but when I open the NUC, I cannot find the battery. Is there a document describing the procedure to replace the rtc?

Thanks in advance.

[LeonWaksman]

1. The procedure for CMOS battery replacement: https://www.intel.com/content/www/us/en/support/articles/000006787/mini-pcs.html CMOS Battery on the Intel® NUC

2. The battery is located on the board upper side. You need to remove this board from the NUCs case.

Leon

[MOver2]

Hey Leon

My problem is: howto remove the board from the chassis ?

I have already removed the hard disk, two screws with which the board is attached,

the vga connector and the little plastic cover(around the HDMI connector etc.) at the back.

I also removed de plastic top chassis cover.

Then I can move the board a bit, but I can not remove it yet.

What else do I have to remove or unscrew?

[LeonWaksman]

I don't have NUC like yours. But I suggest to unscrew the screw holding WiFi adapter and removing this adapter after disconnecting the antenna wires. Please see this clip showing how to do this on very similar NUC:https://www.youtube.com/watch?v=MwqrfIdyvGw&t=300s Intel NUC Fan Replacement - YouTube

Hope this will help

Leon

[MOver2]

Thanks to your tip, I managed to remove the board.

However the battery appears okay.

I was almost certain that the battery failed, because after a short power break, the clock was ok but not after a longer power break.

In the bios I found: "CMOS TIME NOT SET 1/1/2016 0, 0, 0".

Testing was done without an OS (thus no disk connected) to be sure that the problem did not come from the OS.

I suppose I will have to ask a new question to the forum.

Thanks again, Marc

[HWAHS]

I am trying to do the same. Can you tell me how you managed to remove the board. I did all above steps but can't get it out

[MOver2]

I followed the clip suggested by LWAKSMAN: https://www.youtube.com/watch?v=MwqrfIdyvGw&t=300s

It is indeed for a NUC5CPYH while mine is a NUC6CAYH.

these are my steps:

- remove harddisk

- remove the network module

- remove plastic cover on the backside which covers the vga connector (it clicks into chassis)

- unscrew the vga connector and remove it

- unscrew the 2 screws (like in the clip)

- at last remove the systemboard as described in the clip (you have to use some force but not too much)

[HWAHS]

Thanks for your detailed reply. I managed to get the board out, but the CMOS battery voltage was OK and removing it to reset the CMOS memory did not get the NUC to work. I will have to return it.