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The light comes on for a moment and then the whole thing shuts down.

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Hello Drcolangelo, hi, this is a classic case of power supply problem. open the TV, removing and replacing the power supply board with the same model, checking for shorted parts on the main board, close and you are done.

We usually replace the whole power supply board, but to get a new board, you may need to order it from your dealer, or check ebay if there is available online.

To repair ir youtself, you need to check for the following and a lot of electronics know how.

  1. Capacitors that are leaking or bulging out.
  2. Replace the switching IC, or check if it is producing a pulse using an Oscilloscope.
  3. Find low value resistors that are open, or wrong values.
  4. Check wirings, loose screws and unusual things, visual inspections is needed.
  5. Measure voltages, using a service manual or schematics.
  6. Test and retest.until you find the faulty part.
  7. or call for service.

Posted on Apr 27, 2010

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