I changed out one plug and turned the breaker back on.
Did not help it is a dual breaker with on one on and off switch for both. Please help me solve this problem.

Check your connections at the plug you changed, even those splices that may be in the box that you did not change.

Check if you have 120 volts across black and white.

Check for GFI outlets elsewhere that may have tripped and need to be reset.

Quote ''a dual breaker with on one on and off switch for both'' is usually a 240 volt circuit.

Are u sure u are tapped into this circuit?

What is amps of breaker?

Do as tk requested and get back to us.

Chuck