Panasonic TH-42a410t Service Manual

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Panasonic TH-42a410t Service Manual Manual pdf 12 page image

TH-42A410T126.4. LCD Panel test modePurpose:To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.How to Enter:While pressing [VOLUME ( - )] button of the main unit, press [OPTION] button of the remote control three times within 2seconds.How to Exit:Disconnect AC plug from wall outlet.How to confirm:If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns.And then, judge by the following method.Still abnormal picture is displayed: The cause must be in LCD Panel.Normal picture is displayed: The cause must be in A board.Remarks:The test pattern is created by the circuit in LCD Panel.In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal.If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board.6.5. No PowerFirst check pointThere are following 2 states of No Power indication by power LED.1. No lit2. Red is lit then turns red blinking a few seconds later. (See 6.2.)