My wife has a Barista SIN 006 (1995)

Unit made coffee, not espresso, replaced pump, descaled all plumbing, had power to pump after reconnecting electricals. Pump worked! Water at room temperature (obviously no steam). Circuit beaker tripped. Traced electricals doing continuity checks using DVOM. Found 2 thermostat connections reversed. LED portion of circuit now shows no continuity. Before ordering replacement, can the LED portion be tested using a simple continuity test? If the thermostats show continuity, are they proven to be functioning correctly? Is there something else I'm overlooking? Thank you in advance for your help.
dougchesnut@yahoo.com