If you have an Android phone that is TV remote capable there are free apps that will let operate the tv functions.
If not you need to order a new remote.
https://www.amazon.com/XRT122-D32H-D1-D32X-D1-D39H-D0-D40U-D1/dp/B077N1CNN5/ref=sr_1_3?ie=UTF8&qid=1546365811&sr=8-3&keywords=vizio+d32x-d1+remote
Remote ^