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#1
07-22-2012, 09:29 PM
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Nope, that tube is perfectly fine. If those "getters" were white, then I would worry. but they are not. they are normal color.
the VFD is fine, your problem is in the circuitry. your missing the filiment voltage, or anode voltage, or the VFD driver IC is bad. one of the 3. take your pick . 
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#2
07-22-2012, 09:40 PM
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I would suspect an electrolytic capacitor (or more) in a DC-DC converter circuit to run the VFD from 12V could well be at fault. Not too uncommon for capacitors to fail and displays go dim or out completely.
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