Is My XS40 Board Blown Up?
Q:
I attached a center-negative power supply to the power jack of my XS Board. Have I damaged it?
A:
If your board still passes the XSTEST diagnostic (i.e., the LED shows '0' after the test completes), then your board is probably OK.
All XS Boards manufactured since 1999 have protection diodes that minimize the chance of damaging the board with center-negative power supplies.