Always best to start with the basics. Here's the manual for your saw; there's a troubleshooting section that I copied below as a place to begin.
[link|https://www.searspartsdirect.com/manual/2fdac98m1p-000247/craftsman-137218072-table-saw-parts|Craftsman 137218072 table saw manual]
PROBLEM[br]
Saw will not start.
POSSIBLE CAUSES[br]
1. Saw is not plugged in.[br]
2. Fuse blown or circuit breaker tripped. [br]
3. Cord is damaged. [br]
4. Debris in on/off switch
CORRECTIVE ACTION [br]
1. Plug in saw. [br]
2. Replace fuse or reset circuit breaker. [br]
3. Replace power cord. [br]
4. Remove switch from saw and separate in half. Clean any debris accumulated within.
Check their suggestions then come on back and let us know what you find and we'll go from there.