Megear
Switching Power Supply Noise
Charger emits a high-pitched whining noise even when not actively charging.
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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
Aging capacitors in internal power supply, Loose transformer laminations, Operation at light load causing audible switching frequency, Poor mounting of power module
How to Fix / Troubleshooting
Safety first: Noise alone is not necessarily dangerous, but can indicate aging components.
- 1. Confirm source:
- Listen closely to identify if the noise comes from the power supply area.
- 2. Tighten mounting:
- With power off, open the housing and tighten screws securing the power module.
- 3. Monitor behavior:
- If noise worsens or is accompanied by heating or instability, replace the power supply module.
Persistent high-pitched noise from an aging supply is a sign to plan for repair or replacement.
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Repair Difficulty
Medium
3/5
Required Part
Megear Internal Power Supply Module
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