bosche microwave not running

We have a bosch microwave that allows you to set the amt of time to cook, however, it doesnt turn on, it only counts down the time. Is this major? Is it worth a tech coming out for $100? Or should we just buy a new one? It is mounted into the cabinets.

Weigh the cost of replacement against what an estimated repair cost is. Generally, OTR microwaves are better quality and more expensive; so yours might just be worth the repair costs.