Recently my microwave would shut off after only a minute of operation. Shut off as in a complete shut down of the machine-no power to the display and the buttons were inoperable. After unplugging and then re-plugging in the unit, it would work again but only for about 45 seconds and then shut down again. after removing it, opening it up, and safely discharging the high-voltage capacitor, I determined there were no issues with the fuses or the high temperature thermostats. Given the erratic nature of how the unit shut down repeatedly and now won’t even turn on beyond a single blink of the display, would I be correct in assuming the PCB needs replacing? Any other suggestions?