have a vodavi that is making a constant clicking noise, and the phones say no sync. This is with no cards in the system at all, or with the cards in it. phones are 3515-71's I am thinking bad processor, and or power supply. Any ideas? vodavi is one of my weakest links as a phone dude.

Could be a bad cabinet/processor, or it could be a bad memory battery. Try defaulting the unit with dip switch 8 and see if it comes back up.

Probably a bad Power Supply... you could remove the two port slt card and leave the cover off and get another 6 months or more out of the KSU.