You need to find out where the smell is coming from. It could be a wire trapped somewhere.
If the plastic burns through it might short something out.
It could also be a faulty component.
I suggest you take it apart and check every wire and component.
I really couldnt find anything and I tried running it while open to find where the smell was comming from and the smell didn't show up. I have heard that new parts produce a smell like this could it be that