1, U28(ICS 954226) clock chip, if damaged, it will not respond when press the power button. Or auto reboot, or auto power off after led light. If 954226 pseudo soldering, will be able to boot sometimes, can not boot sometimes.
2, L31, L32 inductor, if damaged or pseudo soldering, it will not respond when press the power button, or auto power off.
3, X1 crystal oscillator, if damaged, will not able to boot.
4, C428, C431 resonant capacitor, if electric leakage or damaged,...read more
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