Help with determining dc/dc board issue?

Well, the components in the white circle in img5726 look like voltage regulators. If that is what they are, they can get really hot and are often, but not always, bolted to metal heat sinks to keep them from self destructing. That's why there is a hole through them and sometimes a metal pad to make better thermal contact with the heat sink. It would get extra hot if the input voltage was abnormally high or the output voltage was dragged down, for instance by a short. Were there heat sinks on these, and if so, where those two maybe loose?

There are other components that come in that form factor though, like FETs and some other types of power transistor. Same deal though, they burn up with too much of a load, faulty input voltage (or current), or too small or badly attached heat sink.

At this point you might want to just change the entire inverter. I mean, you aren't going to repair that board, or at least, shouldn't.

 

They're a dime a dozen so why not just take another hole inverter and stick it in the car just because eliminate all of that nonsense and I imagine you've looked back at the battery just because maybe that's what one would do make certain there's no leaks no funny business I see the code in the subcode I get it.

 

Once a PC board gets toasted that bad, it usually isn't worth the effort to try to repair it. That kind of heat just does too much damage.

The techs and engineers I used to work with would talk about the boards "carbonizing" and becoming conductive. When a PC board gets burned as bad as that hole in the middle top of the second image it could have also heated up the internal layers to the point where they fused together, cooked otherwise good components, melted the solder for other components - the list is long.

Even if you could repair that board, I wouldn't trust the reliability. Go with what @Tombukt2 said - replace the inverter.