Bosch SHU 6802 Flashing Lights & Clicks but Doesn’t Run

I replaced the electronics module on my Bosch SHU6802 dishwasher earlier this year after the heater relay burned out. Afterwards, the dishwasher worked for several months. Then it suddenly stopped working at all. I took it apart and found that the heater relay has not burned out. The circuit boards look fine. Whenever I turn the dishwasher on, lights flash with audible clicks, but nothing else happens. I ran the Bosch diagnostic test, ie hold down both Scrub Wash and Delicate/Econo then press the On/Off button, and got a result that makes no sense: the number 93 is displayed and the Regular Wash and Refill Rinse Agent buttons flash. Since running the test, the number 93 now displays when I try to run the dishwasher. Does this mean that I need another new electronics module?