| 开盖观察，发现防止输入市电过高的压敏电阻烧焦开裂。遂将其齐根剪除不用；然后又查dianyuan电源保险管、功率管（IGBT）、整流桥堆等均正常无异，于是决定直接烧水试机，按二次开机键后只听见锅底 |
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