Update:
So fuse arrived today, soldered in to the charger, switched on and POP!
That will be for the bin then as now beyond my understanding of electronics.
At least it never exploded this time.

Ok now waiting on replacement fuse & holder for the other charger,
fingers crossed.

worth replacing the 4 mains diodes if you know how, those are the most likely cause.


NT

I have taken out the doide that reads faulty. I assume its a straight
forward order, its a IN5399 any other rating to consider for ordering.

Is it worth replacing any other parts at this stage? I will replace the
fuse again.