No power, quiet clicking noise from power supply, will not start up.Anyone
have any idea what could be causing the clicking noise?I have changed
several capacitors but no joy.

Is it ok to test capacitors in the circuit board using a multi meter?

"Owen" wrote in message
No power, quiet clicking noise from power supply, will not start
up.Anyone
have any idea what could be causing the clicking noise?I have changed
several capacitors but no joy.

the clicking noise indicates either a short in the circuitry that the power
supply is powering.... OR.... a faulty power supply: i.e. shorted diodes
and other faulty semiconductors, high ESR electrolytics, open resistors,
etc. etc.


Is it ok to test capacitors in the circuit board using a multi meter?

A multimeter will only test for shorted or leaky capacitors, on the other
hand... a specialized tester called an ESR meter can easily test most
capacitors in-circuit and provide the essential testing of the "ESR"
criteria. Lacking and ESR meter the best remaining method is substitution
of a good capacitor...... first verifying that there are no other bad
components like semiconductors, resistors, etc
..... then it may be time and cost effective to just replace ALL of the
electrolytics in the power supply... maybe a dozen or so.... not very
expensive.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
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