Hi Tparys Sorry for the last reply, it has been a couple of busy days. > If they are exactly the same software, it sounds like a hardware issue. Yes that was my initial thought, and therefore I validated with the HardKernel images on one of broken nodes and since the PWM fan was a normal. It seems to be a software problem instead. > If the HardKernel images works as expected, perhaps you've updated all 3, but not rebooted the working one yet? After the second node broke have a turn all devices off each night and the healthy node has worked every day. > Can you post logs of both working and not working boards? Node 1 (Healthy): https://paste.armbian.com/ibofokalis Node 2 (Unhealthy): https://paste.armbian.com/ifihodukoj I am reinstalled armbian 26.2.1 Noble and here is the PWM not working. I am capable of setting a PWM but it doesn't respond to it. It was on this node I have tested the HardKernel Image Node 3 (Unhealthy): https://paste.armbian.com/kemesojuva I have done some additional debug on this node. The hwmon2/pwm1_enable is set to 1 for manual mode and pwm1 is zero even if the fan is speeding at full speed. If I disable the fancontrol service and manually control the pwm1, it is possible to set the pwm to a different speed and the fan will respond but after a split sensor would the value of pwm1 be reset to 0 instead of the assigned value.

Hello! @rosic Yes I took a look at the components of the board and eventually managed to find the resistor that interferes with the emmc clock. Shorting it will put the box in Maskrom mode and enable you to flash the original firmware using the official tutorial from the Linknlink wiki even if you cannot get into Loader mode by pressing the reset button insode the audio jack. I used a metal clamp to short it while I plugged the USB-A to USB-A cable into the 2nd usb port. You can see images here Official instruction here

My bad I didn't specify. On Windows. I lost 4h on it. I needed to use dd on a Mac to create a bootable SD card. Arbian Imager didn't help, it killed my Window stuck on storage finding and couldn't be killed. on Mac made a bad job of flashing, didn't even started boot. Btw on Windows, all methods I used (Raspberry Imager, Etcher, Rufus) all made like 50ish small 0 bite partitions and one big unallocated. Somehow it started booting, Armbian logo on, but then it failed.

The install process is the same from the beginning of the project, you're confused.

https://paste.armbian.com/hicilanono Works just fine