What happens when you try to turn it on? Does the power LED come on? Does the screen light come on after a while? And what "resetting" did you do?
If the power LED does not come on, and it's probably a good idea in any case, plug it in to charge it. No matter what the battery charge level was when you last could see it, you should not assume the battery has not run down. Under normal circumstances, the device will automatically start up within a few minutes of being plugged in. But, there have been a lot of cases where the device wouldn't start, but, after being left on charge over night, it had started.
If it doesn't come one, then you will need to try a factory reset. The instructions are on
https://help.kobo.com/hc/en-us/articles/360017605314.
And if that doesn't work, it might be fixed with an image written to the SD card. That can be supplied if needed.