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Hi and welcome to JustAnswer, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, is the AC power adapter plugged in correctly into an outlet? ...and the other end into the base unit's power adapter jack at the back of the base unit?
Have you tried unplugging the base unit's AC power adapter for a period of time? ...and then plugging back in but into a different outlet?
Was the AC power adapter warm to the touch when first unplugged?