... XS-998C. Table 1 Common Breakdown and Corresponding TroubleshootingBreakdownTroubleshootingPilot lamp does not go on or give out sound after the ... battery capacity is used up, please replace the batteries.Function pilot lamp is gloomy, power of the laser and acusector are ... is insufficient, please replace the batteries.Power and function pilot lamps are normal, but laser and acusector output are ...