3V,5V對地短路維修方向3V,5V对地短路维修方向 1. 目检:Chipset (Southbridge, Northbridge, I/O chip, GD75232, Sound chip), AC97, PWM... 是否有烧毁, USB, P/S2 Connector,PCI slot,AGP slot,ISA slot, CNR Slot, Chipset…是否有撞坏造成短路. 2. 触摸:打开电源触摸 Chipset 是否有发烫. 3. 电源不打开时,用电表检测那组电源短路,再决定移除短路电源有连接相关芯片,PWM,电阻电容....