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How can I fix my Sagem CDC5000?

Thermal fault. Doesn't switch on properly when too cold or too warm. Makes a high-pitched whistle. Occationally works fine. Have heard others with the same model tuner struggle with the same thing, so I gather it's a design or construction flaw.
Hybris, April 2015
Take it back where you bought it for a refund under the Sale of Goods Act. Take evidence with you that it is an inherent fault. You have up to five years to do this in England and Wales.

T, May 2015
link Click here to see other fixes for Sagem CDC5000.