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Repair questions can be on topic if it's about the underlying electronic principles. Just "How do I fix this?" is off topic. There is little wiggle room for trying to repair a consumer device tha...
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#1: Initial revision
Repair questions can be on topic if it's about the underlying electronic principles. Just <i>"How do I fix this?"</i> is off topic. There is little wiggle room for trying to repair a consumer device that you don't even have the schematic for. That doesn't mean you can't, but that such questions are hard not to be just <i>"How do I fix this?"</i>. You might explain what the overall symptom is, what you have done, possibly with some photos, show measurements you've taken with a meter, and ask what the next steps to diagnose the problem might be.