TCL LCD TV L32E19 (MS19C movement) crash failure maintenance example - appliance repair - Huaqiang electronic network

Single chip microcomputer STM32L151CCU6

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Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

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One-piece inductor

TCL LCD TV L32E19 (MS19C movement), the machine crashed for dozens of minutes, the online view said that the machine motherboard broken hole phenomenon is common, but the fault occurs in the heat machine, so it is very difficult to check.
According to the phenomenon, the 5V voltage regulator block was first replaced, and no result was found. At the same time, it was found that the main chip was seriously heated, and the heat sink failure was still increased.
Try to add a small fan on the motherboard to observe that the fault no longer occurs. Due to the small space, it is really difficult to install the fan, mainly because the back cover needs to be improved.