I just bought a house with an IMA 406 Nutone intercom system in it. There are about 8-9 satellites off the main station. The main station does not work at all. It worked when we looked at the house. Is there a fuse on the unit? How can I check to see

if it is getting power? Do I have to replace the main unit & ALL of the units? I also have a fire and burglary system. Don't know if the relay for this could be affecting this. I know the power is live coming to the unit, but don't know how to check the unit itself?

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