This is from a 55" Samsung LED tv. I have no idea of the expected behaviour but seems faulty to me. The set doesn't work with the mainboard plugged in so I unplugged it to try and isolate fault.
When plugged in by itself (or with led) there is a faint tick that sends all voltages rising momentarily, then back to zero and over again. Cycle takes 4-5 seconds. The 5VSB line is the only line rock steady.
What confuses me is the three pins generated by the mainboard (PSON, BLON and DIM) rise and fall in voltage as well (without mainboard attached!). So it seems like a short is causing stray voltage and tripping whatever protection the board has.
How can I determine if the PS is faulty and which component is causing the problem ?
When plugged in by itself (or with led) there is a faint tick that sends all voltages rising momentarily, then back to zero and over again. Cycle takes 4-5 seconds. The 5VSB line is the only line rock steady.
What confuses me is the three pins generated by the mainboard (PSON, BLON and DIM) rise and fall in voltage as well (without mainboard attached!). So it seems like a short is causing stray voltage and tripping whatever protection the board has.
How can I determine if the PS is faulty and which component is causing the problem ?
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