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How can I fix television model: ns-pdp50hd-09?

insignia, model ns-pdp50hd-09, problem with power supply board lj44-00145b, green led blinks 4 times. i would like to know wich component/s is defective and schematic location of the defective parts.
thank you.
igor, February 2011
link Click here to see other fixes for Insignia ns-pdp50hd-09.