Battery problem from Wales

I really don't see how anyone can give you a answer on this without the machine. I don't know where you buy your parts but anyplace I buy mine from you don't return electrical parts if you don't use them. This can be costly to buy parts just to try. I am going to say unless you know that you are doing take it to someone who does. I will properly get a lot of disagreeances on this answer.

it should be fairly obvious, either by sight or smell. Yes by all means fix it. I find in my shop that's not the case as a rule, but if it is good. You will save yourself some money if its that simple. Things you can see like fuses or burnt wires. Yes pull things apart and look. All I am saying just don't start buying parts to try things out. You will find it cheaper to have someone who knows that they are doing. Just saying once you buy a electrical part you own it. Now I wouldn't think too much about the smell part because by then it could be more them one part burned up.