What is your power source?  How many servos?  The EZ-B will brown out if not supplied enough amps.

Power source is a ac adapter 120v with 10 digital servos, and my dynamixel servos are plugged into my hub adapter.

@JerseyLance,
You need to be more specific about your setup. You have a long history of issues i.e. posts with Dynamixel servos, maybe the devil is in the details.

Let's break the "problem" 

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I'm testing my smart servos? I have smart digital servos and Dymanixel servos

So you have 2 type of servos: Dynamixel Servos and Smart Digital Servos.

Q1) Dynamixel servos model ?
Q2) Smart Digital Servos model ?

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The digital servos are plugged in the ezb 4 thank you,

So your "smart digital servos" are not smart but digital servos (PWM) connected to EZB digital ports ?
Q3) Can you confirm my assumption regular digital/analog pwm servos not smart servos ?

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plugged in the ezb 4

Q4) What's the EZB4's power source's specs: Voltage and Amperes.

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Power source is a ac adapter 120v 

120 v is obvious (US & Canada) although is not relevant to EZB,

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know why do my ezb 4 restart

Q5 What action caused the brownout ? Did you tried to move a single servo position ? multiple positions ? while idle ?

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My Dymanixel servos are connected to a 3pin hub which is on port 5 and 6 hooked up.

Q6) Can you be more specific what is a 3 pin hub (maybe upload a picture) and the wiring between port 5 and 6 ?

Thanks for responding back,  but I'm on my way to my office I'll show my pictures as soon as I get there ok.