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    jchoo's Avatar
    jchoo Posts: 69, Reputation: 2
    Junior Member
    		  
    #1

    Oct 11, 2010, 03:38 PM
    Fluorescent sign
    My Fluorescent sign just went. I've 2 signs tied in together some how with a total of 4 ballast. One of the signs has been out for awhile and I've been running only one of them. The 1st thing I did was replace 2 tubes and that didn't work. There is power coming in. What could it be ?
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Oct 11, 2010, 05:12 PM

    A bad ballast. An electrician will have no problem fixing this for your business.
    jchoo's Avatar
    jchoo Posts: 69, Reputation: 2
    Junior Member
    		  
    #3

    Oct 11, 2010, 06:46 PM

    Is there a quick way to know which ballast is bad ?
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #4

    Oct 12, 2010, 04:13 AM

    To be honest, no. it is a matter of tracing wires, or disconnecting ballasts and turning power back on to see which ballast is which.

    Where is this sign located?
    jchoo's Avatar
    jchoo Posts: 69, Reputation: 2
    Junior Member
    		  
    #5

    Oct 12, 2010, 03:22 PM

    It's above my store front. About 8' above ground
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
    Uber Member
    		  
    #6

    Oct 13, 2010, 04:36 AM
    Stan is correct, other than tracing wires from the lamps not working to the ballast that operates those lamps, there is no trick to determining which ballast is defective.

    Many times a bad ballast is extremely hot to the touch, much hotter that properly operating ballasts. Sometimes it is dead cold.
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