Hisense LCD TV TLM4077D volume automatic addition and subtraction fault repair - android - Phones Developers

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The fault of the Hisense LCD TV TLM4077D volume is automatically added and subtracted. This machine belongs to the rework machine. The original voltage plate is damaged, repaired, and the button is replaced at the same time. Take away.
The machine will automatically reset the fault and return the fault. Careful observation of the automatic button phenomenon, disassemble, carefully observe the button board did not find the phenomenon of welding, doubts, when the button is automatically added and subtracted, pull out the button plug failure. It should be noted that the automatic button addition and subtraction occurs only when the remote control is pressed or pressed. For example, pressing the volume button adds the volume to the 100 without stopping, or sometimes automatically adds one or two grids or normal, otherwise One time will not be delivered to the user.
Similar faults are common, or the motherboard or related components are leaking or bulky.
In the principle of simple to complex, first replace the remote control head, invalid, empty user memory. Booting up, found troubleshooting, but also found that the brightness has also increased a lot, very beautiful. Originally, the image was not very beautiful when it was repaired. Although it was unsatisfactory to try to debug it, the principle of doing more than one less thing was not studied at the time.