PA0O ham radio

Inside watertight box of the SGC-230 near the power terminals exploded fuse and some damage is visible besides that no damage to the PCB    This SGC-230 tuner is damaged after applying 230AC at the 14VDC connection (wasn't  me ..)   First investigation showed CPU and most IC's damaged   at least those connected to the 14VDC power    A simple 50cent  surpressor could have prevented this total loss.  .. The 5V regulator and the 3 relay driver IC's destroyed   by the high voltage flash . the relays tested okay not that many chips involved but the most essential CPU is hard to get. The SGC factory seems no longer to exist. Looks like a total loss ...only  chance to save would be  a  programmed CPU or the V1.03 firmware ?  Somewhere an ex employee of SGC has the f.w. resting in a drive? The  CPU is  MC68HC711E9    I think she is still offered on Ebay  I hope to replace the controller...