S,
It is unlikely that you will be able to repair the IC40. It might be worth a shot if they were very cheap and you knew for sure that you could get one with good plates and another with good electronics, but of course you can't be sure. So you could easily end up with units that all had the same basic failure.
Pentair SWCG's were built as consumable, throw away items...
If you decide to give it a try, please let us know what you find.. It would be interesting to know.
Thanks,
Jim R.