Justice B K Nayak imposed the fine on the Sundargarh MLA observing that despite repeated notices, he had failed to comply with the court directive to produce his witnesses for cross-examination.
He had also been fined by the high court in May 2016 for similar lapse.
Singh's election to the Assembly in the May 2014 elections was challenged in the high court by BJD candidate Kusum Tete in an election petition.
Similarly, another voter of the constituency Ajay Patel too has challenged the election of Singh in the high court.