Nabi dreamtab is stuck on Dreamtab powered by Android screen.

Try another power adapter for a USB device. If this is the type unit you are referring to, it looks like it has a power/charging adapter as well as the USB cord? Those are pretty much standard with a few exceptions. The cord rarely fails but a power adapter sometimes fails.

eBay shows a lot of available replacements.

Also, make sure the electrical outlet is live. Do other things plugged into the outlet work?

And, if the power adapter has a fuse in it (can't tell from these listings), make sure it is not blown.

https://www.ebay.com/itm/US-SHIP-Charger-Power-Cable-Cord-For-Fuhu-Nabi-DreamTab-DMTab-Jr-XD-Kids-Tablet/201811395275?hash=item2efce582cb:m:mPmUhItDnfyw9Cp7Kqg09EA

I Need to Perform a Factory Reset on My DreamTab
nabitablet com

Then the Android OS is corrupted or there is a problem with the memory in it. It needs to be sent in for repair.

Review: Nabi DreamTab HD 8 kids' tablet - Gizmag

www.gizmag.com/nabi-dreamtab-kids-tablet-hd8.../34762/

GizmagNov 14, 2014 - Fuhu's Nabi DreamTab HD 8 is a fully featured, sophisticated Android ...There's a microSD card slot onboard but unfortunately no HDMI port. .... Audio was terrible and would sometimes just be extra loud static that would ...

nabi DreamTab - Kid's Android Tablet For Creativity

https://www.nabitablet.com/dreamtab

Teach your children to manage their time and make responsible choices. Exclusive apps like Chore List and Treasure Box give children real incentives for ...

Fuhu Nabi DreamTab Review - Tablets for Kids

www.laptopmag.com/reviews/tablets/fuhu-nabi-dreamtab

Rating: 2.5 - ‎Review by Anna Attkisson

Some touch screens are just like that. Not many.

try resetting it

nabi DreamTab Reboot

Have you figured this out? I need a new screen too!

My dream tab software upto date problem

There are two types of resets that you can perform on nabi - forced reboot and factory reset. In the unlikely event that your nabi becomes unresponsive, you can easily perform a forced reboot. A factory reset is recommended when slow performance persists or if you want to wipe out all of your personal data and settings from nabi. Forced Reboot: To perform a forced reboot, hold the Power Button down until nabi turns off. When nabi is off, press the Power Button to turn on nabi again. Factory Reset: Caution! A factory reset is a very serious process because it will SYSTEMATICALLY WIPE ALL USER DATA from nabi. A factory reset will return nabi to its original factory settings.To perform a factory reset from Mommy/Daddy Mode, tap All Apps > Settings > Backup & reset > Factory data reset > Reset tablet > Erase everything. Please note: We highly recommend backing up your nabi prior to performing a factory reset. You can back up your music, videos, photos and apps with nabi™ Sync.

power it off totally , remove sims.
power up with a usb attached to your pc
it will go into debug/recovery . its kinda iffy so retry