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    Default Understanding Blinking Power Light on Sharp TV"

    I have 46" Sharp TV LC-46D85U, recently it doesn't power on. It gives flashing one power light and OPC light together then flashing one on power light, then repeat the flashing pattern, I checked the forum and the error code for this pattern, it indicates the power supply board is faulty. I am not sure it is the power supply board or other boards. I measured the voltage on the PD connector, I have +2.99 DCV on pin 8 (AC_DET) and +5.01 DCV on pin 12 (BU5V), other pins and LB1, PL, LB2, LA connectors has 0 volt. I removed the power board and connected with BU 5V + 490 ohm resistor to pin 9 (PS_ON). Then I have voltage as 13.5v on pin 1, 2,3,4,5; 0 volt on pin 6; no wire on pin 7; +2.99V on pin 8; +4.8V on pin 9 (PS_ON); 0 volt on pin 10 (PNL_POW); 5.01V on pin 12 (BU5V); no voltage on LB1 and LB2; no volt on pin 1,2(PNL12v), 3,4 of PL connector Understanding Blinking Power Light on Sharp TV"; but I have 12V on INV12v and 59.7v on INV60v of LA connector. Not sure the pin 10(PNL_POW) of PD should have any voltage? Do I have bad power board or main board? The power board is DPS-277BP, RDENCA295WJQZ. Please help. Many thanks.

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