How do I do hard reset on Nobis 9" tabet?

Always buy from Walmart so you can return the junk.
Customer Reviews Nobis 9 Tablet 8GB Memory Dual Core Walmart com

Hi Jeffrey, The link below is a YouTube video showing how to fix your tablet, Also there's video's down the right side of the link that may help as well....CHEERS..
How To fix any Android Phone Tablet that won turn on

Not sure what version of Android O/S you are using but in

Settings > Developer Options look for:

Force RTL Layout Direction

If it's got a checkmark then uncheck it.

Nobis 9 tablets are defective. Many, if not most, of them end up having bad internal memory. They might work for a week, a month or maybe even two months but, sooner or later, theminternal memory goes bad. When this happens you get the stopped working error messages and in many cases it will no longer boot up. Just Google, Nobis NBO9 stuck on go and you will see you aren't the only one who got ripped off when you bought this POS.

I know, I have one. I sent it in when the internal memory went bad. Cost me 20 bucks postage. They fixed it and sent it back. It worked about two weeks and the internal memory went bad again. Then they gave me the runaround and refused to issue me an RMA.

Stay away from anything sold by Bidwell that uses the Nobis brand. Better yet stay away from Bidwell period. They are rip off artists, IMO.

try holding power button in for like 30 seconds to completely down power tablet

Does this have an SD card installed? If so it might be corrupted or failing. If not, try a hard shutdown or of you have access to battery area remove battery for a minute then reinstall battery and power tablet back up. One other option would be to go into download and delete any failed downloads and try them again.

play mother may i :)
turn it on with a computer usb cable plugged in
turn it on holding vol cont up +
turn it on while flapping the other arm
you ddint say mother may i

i think you need to hard reset it it looks like SW issue

i would suggest hard reset looks like a software issue