As a rule of thumb, when switchmode/class D amps get plugged into twice the voltage they were designed for, the destruction is typically fairly complete... at least compared with the cost of replacing.
One reason why manufacturers discourage such repairs is that it involves working on circuits on both sides of the primary-secondary safety barrier. After such repairs, the power supply should be retested according to the international safety standards they were designed to. This is to insure that no damage was missed that could jeopardize safety (both shock and fire).
Most repair shops do not have this equipment and knowledge to do so. No manufacturer that I know of wants to go down this road, too much liability.
Well…considering who’s offering the above professional opinion, I think we can safely say “R.I.P. Elf” at this point.
Our condolences @somedevil.