Power supply ,upper left, has a fuse that looks like a resistor on the transformer board. This suggests a possible failure, in the power suppy circuits . This includes most diodes, capacitors, and !C502, a regulator board STK470. This 470 contains a 9 volt
regulator which supplies the DVD motor circuits. My best guess is to test with power off for continuity of the fuse. Then your on your own.
jay
December 2009
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