E18

Sage Control PCB Communication / Interface Fault

Microwave displays an internal communication error; some functions may be disabled or the unit may reboot intermittently.

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Loose connector between display and power boards, damaged communication bus on PCB, electrical noise from failing component, firmware corruption

How to Fix / Troubleshooting

Safety: Unplug the microwave before accessing internal boards.

User-level steps:

1. Power cycle: Unplug for 10 minutes, then reconnect. This can clear transient communication faults.

Technician-level steps:

2. Reseat connectors: Remove the control panel and carefully reseat all ribbon cables and harness connectors between the display, keypad, and main control board.
3. Inspect for damage: Look for burnt components, corrosion, or cracked solder joints on the boards.
4. Replace control assembly: If communication errors persist, replace the affected control PCB(s) with Sage-compatible parts.

Persistent communication errors generally require professional service.

Repair Difficulty

Hard 4/5

Required Part

Control PCB Assembly

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