@dc42 the TR5 chip which I think is the mosfet for fan0 looks to have some damage. Maybe this helps?

@bearer could this be it?

@bearer

@dc42 yeah neither of them get warm. The SD card works fine.

@bearer only problem is that I bought it second hand. I'll try to contact the seller.

@dc42 Hi I heard that you do repairs on boards. I currently have a duet 2 wifi that I made a post about and I think i've broken it (more detail in the post). Do you still repair boards? I'd be willing to pay for shipping+parts+some extra before I go and buy a whole new board. Thanks!

@bearer I see you live in Norway and repair boards. I live in Spain. I'd be willing to pay you if you are able to fix it or at least try. Much rather have you take a look at it before I go and buy another 180EUR board haha. Let me know if you are interested.

@bearer If I take it somewhere to get the CPU replaced, would it be worth it or do you think it probably has other issues?

So i was trying to set up my ender 3 with the duet 2 wifi. This is my first time setting up a duet board but I have set up the MKS gen L before.

I did all the wiring and uploaded the firmware to the printer. Everything looked great. I then attempted to turn the hotend fan on through the web interface and heard a loud crack sound coming from the board. I instantly turned it off to make sure nothing had gone wrong. There was no smoke and the board seemed perfectly fine. However, every time I try to turn it on now it just won't. There are some flashing lights as seen in the image and the CPU gets really really hot in a matter of 5-10 seconds. Hope i didn't mess it up too bad. Any advice on what to do would be really appreciated.