548. During the start-up of the circuit shown in figure "B" of the illustration, it is noted that the ends of component "4" remain lighted but the tube does not illuminate. What is likely the cause of this problem

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component "5" contacts are stuck closed

548. During the start-up of the circuit shown in figure «B» of the illustration, it is noted that the ends of component «4» remain lighted but the tube does not illuminate. What is likely the cause of this problem

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548. During the start-up of the circuit shown in figure «B» of the illustration, it is noted that the ends of component «4» remain lighted but the tube does not illuminate. What is likely the cause of this problem

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