2 x Sanwa and 2 x Acoms Servos - Listed as Parts not Working

I have tested all 4 servos and the motors run fine but there are issues with the cable feeds/circuit boards. Neither of the Acoms are picking up power from the plug or from the contacts on the circuit boards. The Sanwa servos do pick up power from the circuit board contacts but not from the plugs.

May be someone with more electronic than I could repair them or they could be used for spare parts.

Please feel free to ask any questions about this listing and thanks for looking.