Hi and welcome to FixYa, I am Kelly
Most likely the heater has failed.
The manual for the 20070106 is on this page:
http://www.masterbuilt.com/manuals.aspx
The element kit is PN:
9907090033 (Est. $45.00)
My thoughts are the element has shorted out. Before ordering read out the element with an ohm meter. Read each terminal to ground with the at least one wire disconnected. Then read the element end to end. You should read resistance end to end but NOT end to chassis.
That is just for the element. You said it did not come back on after resetting the CB. If the display is blank the control panel has failed: Contact Masterbuilt at 1.800.489.1581 (<-Only source)
MASTERBUILT Customer Service at 1-800-489-1581.
Control panel PN:
990050048 Digital Control Panel Kit
Something has caused the control panel to fail... if there is a chassis short some where in the unit you can have a brand new control panel fail. Inspect the wiring and components for signs of damage BEFORE replacing the control panel. Repair any wire damage found. Thee are only 2 components that use electricity; the control panel and the heater. Finding a wiring problem should be simple.
Thanks for choosing FixYa,
Kelly