#1 there is 'Nothing' installed in a hidden junction box that can trip !
illegal to put circuit breakers, fuses, or switches in such a location
NOW did your tech say the circuit breakers had power
OR
did he say power at the 'outlet'
if there is power in the out let box, the outlet is bad
yes there could be a broken or loose wire someplace between the circuit breaker and the outlet, yes there probably is a junction box with connections in it
IS your dinette in a slide out ?
then you could have a broken or loose connection somewhere with the flex cord for 110v supplying that outlet
I can explain it to you.
But I Can Not understand it for you !
....
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