Tristar
Display / VFD or LED Module Failure
Microwave display is dim, flickering, or completely blank, but the unit may still heat when buttons are pressed blindly.
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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.
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Possible Causes
Failed display module (VFD/LED), Weak display power supply on control board, Loose display connector, Cracked solder joints on control PCB
How to Fix / Troubleshooting
Safety: Unplug the microwave before accessing the control panel.
Steps to address display issues:
- 1. Check brightness settings: Some models allow dimming the display. Verify it is not set to the lowest brightness.
- 2. Power reset: Unplug for several minutes and test again.
- 3. Inspect connections: Remove the control panel and check the display module connector. Reseat it firmly.
- 4. Examine solder joints: Look for cracked or cold solder joints on the control PCB near the display. Reflowing solder is a technician-level repair.
- 5. Replace display or control board: If the display remains dim or blank, replace the display module or entire control PCB, depending on how Tristar integrated the display for your model.
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Repair Difficulty
Medium
3/5
Required Part
Display Module
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