Barbagris wrote: The cover seemed somewhat toasted by the area on the wiring / coils.
Yeah, the charrgers run really hot. That's unfortunately normal, or at least usual.
The large condenser on the left has a color that is a bit more toasted than the other two.
It will probably survive, but would be good to replace if it's not a whole lot of trouble.
I remove the small top board, and I find visible damage, there is something melted.
There's your problem
It will be the 2.2 μF capacitor, shown in this schematic
(available from the index on the first page).
Problem is, it might be melted due to heat from the pre-charge resistors, which are looking a bit toasty. It seems to be melted from the -re-charge resistor side. So you may well have high resistance or otherwise bad pre-charge resistors, and that might be because of a short circuit on the other side of the pre-charge resistors.
The other possible problem is this:
There are two small blue capacitors, one outlined in red. The other one is unfortunately hidden by a connector. These often blow, and are a major cause of iMiev charger failures. So please check the other blue capacitor, and if possible check that they aren't shorted. (Usually they'll blow to smithereens if they do short, however).
Please follow the instructions in the first few pages of this topic, and see where that gets you. Kiev has summarised a lot of good information there.