First, check your owner's manual for possible solutions if you don't have it, it is [https://manuals.plus/onn/8tablet-manual#axzz7W4aGX258|here] a guide to troubleshooting android devices that won't start is [https://www.howtogeek.com/216880/what-to-do-when-your-android-phone-or-tablet-won%E2%80%99t-turn-on/|here] if after consulting these you still have a problem come back and tell us what you have already tried, give as much information as you can include pictures of anything noteworthy. Good Luck, holler if you need more help.