Hisense LCD TV 37K16 boot power red light no sound failure repair - Home Appliances

KKST patch plug-in active passive crystal oscillator hot sale 24.576000MHZ

Hisense 37K16 LCD TV is turned on, the power supply is red, no image, no sound.
Check the power board 24V, 12V, 5V all, only STB = 5V.
Then check the power supply PS-ON = 0V. The standby voltage is there, PS-ON is not, it seems that the problem is on the motherboard.
Look at the picture, check the motherboard pin J901's 1 pin does not have PS-ON voltage, the amount of U39's 124 pin is low voltage, Q30's C pole has no voltage, R450 upper end has 5V, the measurement R450 is good, it seems that Q30 has a problem, After changing Q30, everything is normal.

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24V Adapter

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