HURCO VMX42t Ultimax Boot Loop

Hey guys,

we have an issue with this machine. When starting up the machine it passes ram tests on bios screen, everything is OK and then when HURCO logo appears it crashes and starts all over again.

I tried all modes using F8 key - last known config, debugging etc and I can't find out anything. No option in F8 is working (it always crashes on hurco logo - same as with normal start). So I am not able to get any log file or anything. We found out that there is a fuse thats named F12 (probably an electrical fuse that powers one of the cards or machine modules) and every time we change the fuse and start the machine it immediately burns the fuse.

Would anyone here know what the F12 fuse is for? Or do you have any tips?

Please let me know. Thank you!