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UPS-normal or replace?

Discussion in 'Displays' started by Phil P, Aug 4, 2005.

  1. Phil P

    Phil P Agent

    Jul 4, 2002
    Likes Received:
    Recently bought the Panamax 1500 UPS to plug my DLP projector into. The unit makes a low humming sound when it is plugged in (like the sound of a flourescent tube light). Is this normal? When the unit goes on to the battery backup, the hum becomes much louder. Is this normal? Should I ask for a replacement or is this what should be expected?


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