ha1156w:
Probably high ESR or otherwise faulty electrolytics in the SMPS.... or
possibly elsewhere on the board on the power supply secondary B+ rails or
flyback derived B+ rails..
An ESR meter will help find the faulty electrolytics otherwise the procedure
of bridging or substitution is the way to find them.... with the help of an
oscilloscope..... and an isolation transformer.
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Best Regards,
Daniel Sofie
Electronics Supply & Repair
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