Modified or pure sine wave inverter?

A short that big would almost certainly have blown more than a single component.

Inclined to agree with that - I can't see that repar of damage to that degree is likely to be cost-effective. Also, if the damage is in the RF part of the receiver, it's likely to require more resources than a mate with a soldering iron and an RS account.

Better chuck it and buy a new box - IMHO!
 
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