Resetting a residential microwave electronic control or power board requires performing a complete electrical power interruption. Because microwave control boards lack a manual reset button, you must unplug the appliance power cord from the wall outlet or switch off the dedicated circuit breaker at your home electrical service panel. Leave the power disconnected for a full two minutes to allow internal control capacitors and microprocessor chips to drain completely of residual voltage. You can troubleshoot control boards safely. You can verify that your corrective action is successful when restoring electrical power causes the digital display to reboot, flash the clock, and return to a normal standby condition ready for operation.
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