Up2 low temperature issues

jakob

Hi,
we are using the Up2 N4200 4GB/32GB in our product. Now we recognized that some boards (~5 out of 50) have problems with low operating temperatures (0-5°C). They restart, freeze (after around 2-5 mins) or do not even boot up. The blue light is on but everything else incl. the fan is off when it doesn't boot up. We made sure that our power supply is not the reason because we saw the issues with our own extension board with power supply, as well as with a 5V/6A DC jack power supply. We have the miniPCIe LTE module connected. The CPU temperature is 8-14°C.
As soon as we bring the boards back to room temperature they work normally again. This is super annoying.

Does anybody have an idea what the reason could be and how to prevent this?

rogertsai(AAEON)

@jakob
Please provide me with details on the information below
1. May I know your current BIOS version?
2. Does Num-lock working when this problem occurred
3. What's the freeze you see? OS logo freeze (e.g. Windows blue, dotted circle), or just showing a black screen

Have you tried to update the BIOS to latest version? If not, please update the BIOS to R5.2
UP Squared UEFI BIOS V5.2

jakob

Hi @rogertsai(AAEON) ,
Thanks for your response. We were running BIOS version 5.0 and updated to 5.2. Now they are working without any problems. Thanks for your help!

Is there a way to update the BIOS from the OS, so that we could do remote updates?

rogertsai(AAEON)

@jakob
You can try to use afulnx to flash the BIOS on Linux, here is the link from github
https://github.com/mrwnwttk/afulnx

If you are running Windows 10, try to google the keyword about "afuwin64" tool