Paul C Alexandria , VA July 28, 2018 Appliance: Bosch Microwave HMC80251UC/01 Bosch Microwave Hmc80251uc/01: Dim display on Bosch microwave/convection oven. How to replace Electronic Pc Board. Replaced main control board 7 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes