Quote from Carl McLaughlin on February 13, 2022, 11:57 pm

I'm looking for the value of D3 on the Spark 40 main board.  It is right by the two pin input connector.  This component I believe is just a tiny diode that I am hoping to replace (somehow) and that it will solve my problem with no input signal.  My friend plugged it in to a 1/4" jack that had 110 volts AC on it and it evaporated the two pin connector wires and blew apart this first diode (D3) in the input section.

Thanks for any help that anyone can give me.