First check whether the sensor signal cable is welded back.
93C46 is to short-circuit re-calibration can be done. Input 6699\/65008, each brand of correction method is not the same, this is the desktop electronic name.
93C46 is a calibration IC chip, which stores the calibration data of electronic scale, located on the upper right of the motherboard, 8-pin in-line chip EEPROM, DIP package. If you are lucky, pull it out and plug it in, and if you are unlucky, you can only replace it.