Question about Sanyo DS36930 36" TV
This is indicative of what is known as a "dry joint"
Intermittent problems such as this can on occasion be very difficult to trace
If you are OK working on high voltage equipment and have both the equipment and expertise it is possible to do some of these repairs yourself.
I tend to use a simple approach of disconnecting the equipment and simply checking for loose connections by unplugging boards (one connection at a time) until I have re-seated all the simple connections on the boards.
Then i would power up and check to see if the fault was fixed.
If it wasn't then I would remove the boards associated with a particular fault and check the solder side for dry joints and re-solder as needed (this requires patience and very good eyesight)
If that fails on a dry joint repair I would tend to try another board just to make sure its not a component level repair that is needed
Failure with the suspect board would lead me to maybe (depending on the time invested) move to an associated board.
If there is a lot of SMC on a board I would tend to recommend a new unit to the customer as I don't do Surface Mount Component repairs apart from some of the more common ones.
Posted on Aug 22, 2010
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Posted on Jan 02, 2017
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