What’s wrong with my treadmill and how can it be fixed ?

Whenever I jog on my treadmill it would go for tens mins the stop then it would run for 3 mins then stop, then two mins then stop and now one minute and then stop all of a sudden. Now the end result is when I try to use it it makes a popping cracking sound and has a burning smell . What is the issue of it and how can one fix this professionally 

2017-04-11T00:37:33.809Z