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According to the faults you described, most of them are problems with the power management chip or the North Bridge, which need professional maintenance personnel to help you repair. Other common reasons: loose memory or problems with the memory itself, try to reinsert the memory or replace the root memory; The motherboard power chip is welded or aged, the shielded wire is loose or the motherboard power circuit is short-circuited; Graphics card, South Bridge and North Bridge BGA package chips are soldered or damaged. Generally, there are many cases of virtual welding, so it is good to add welding. Solution to notebook hardware question