Shows no display

1) If the microwave shows no display or does not operate (dead) check for continuity on the
cavity thermal cut-out (TCO), if open, replace the cavity cut-out (WB24X29270)
2) If the convection feature on the microwave is not working (not heating) check for continuity
on the convection thermal cut-out, if open, replace the convection cut-out (WB24X29271)
PVM9179DK1WW
PVM9179EK1ES
PVM9179SK1SS
PVM9179DK1BB