Dryer won't start

Went to start dryer, Set timer, then went to hit start button. No clicking noise like usual. Lately I needed to hold the start button for a brief time to start the dryer. The door switch seems to be functioning. Any suggestions? Thanks

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No humming noise. I have replaced the starter switch and thermal fuse. Now the starter switch makes a click sound when I press it in, but still nothing. I don’t know how old this dryer is and I have already spend $45 on parts. I don’t want to dump money into a this dryer if it is a loosing battle. Thanks
Nancy