TBH rather than relying on a repair of the burnt track I really need to understand why it failed in the first place, or it'll likely just fail again
Yes. it’s worrying that you reported seeing sparking. I fear the track might be just a symptom and the problem is lurking elsewhere. A repair might just fail again or worse if a thicker repair wire is used.
PS - It looks like the failure might have occurred on the tracking to the heated screen relay coil.
One for the proper elec experts…. Is that a flyback diode? Could that have failed shorted?
![[Linked Image]](http://tm-img.com/images/2023/11/05/daves-pcb.jpeg)
