I've been asked to look at a CFL floor lamp. It's many (5-10) years old and one day stopped working; it simply didn't turn on. The fluorescent bulb (four short (5 inch?) tubes extending from a plastic base with a single four pin cluster) was taken to a store and it did work there, but the bulb's whereabouts is currently unknown.
Randomly probing between pairs of the four holes in the lamp socket at random shows between 5 and 15 VAC, but nearly zeros DC.
Is this lamp likely to have user-serviceable parts inside, like ballast for example? Or is the only course of action to buy a new CFL bulb and see what happens?
update: based on helpful suggestions from @ I've opened the base of the floor lamp and there's a whole circuit board full of components!
There's a small fuse(?) labeled F1. My low quality DVM reads 0.7 Ohms when I touch the probes together and the same 0.7 Ohms when I touch them to either side of the fuse. Yes it's still in the circuit, but it at least suggests the fuse might be okay.
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