Yesterday, a Hisense LED46K310X3D was not turned on. Occasionally it could be turned on but it was automatically turned off in three or five minutes. It is predicted that there may be a capacitor pregnant, and my heart is happy. Unpacking the shell visually predicts no capacitance pregnancy. It is not normal to measure PFC347V. According to the picture processing, the normal 377V. Re-test machine still does not boot, accidentally turned on but after a few minutes, it automatically shuts down, I am dizzy, the problem has not been found. Subsequently, a 3.3 volt instability was detected, and a 2.9 to 3.1 V transition was detected, and the pull-up resistor 120 of the detection control terminal was changed to 149 ohms. There is no silk screen on this chip resistor, which can only be repaired by drawing and principle. Then remove the chip resistor and find a common resistance welding on the output and control legs. 3.36V is coming. Semiconductor Moly Semiconductor Moly YANGZHOU POSITIONING TECH CO., LTD. , https://www.cnchipmicro.com . Repair is complete!