Zeki Quad Core Android Tablet. Wont stay on. Shuts off as soon as its on.

send it for warranty repair

Sounds like defective battery

wifi problem.

Beginner guide to Android How to setup your phone or tablet

How to Reset Samsung Galaxy Tab to Factory Settings Galaxy Tab Forum FAQ...

When you long-press the power button on Android, this usually causes a forced shutdown.

A hard reset is when you reset your tablet to a state where there is nothing on the tablet except for the default apps and the operating system.

Go to this site for the instructions on how to do a hard reset on your tablet.
http://www.howtogeek.com/130611/how-to-factory-reset-your-android-phone-or-tablet-when-it-wont-boot/

You can try a factory restore, but if that doesn't work you will need to buy a new tablet. These cheap tablets are throw-aways unfortunately. Note that a factory restore will erase any files you have on the device.

Factory Restore on Android devices:
- Turn off the device
- Hold Volume Down and also press the Power button until a menu comes up
- Use the Volume Up and Down buttons to select Factory Reset (or Restore)
- Press Power to select

From off, press power on and volume+ together until reset page comes on, then move with volume and select with power!

You might try resetting the device. See this site... http://www.howtogeek.com/130611/how-to-factory-reset-your-android-phone-or-tablet-when-it-wont-boot/

Try setting the unit to factory defaults.

This will reload all to factory defaults

You will loose all data saved.

I'm assuming it is the Zeki 8" TBDG874B. What I would do to get it of the flashy Android logo is hold down the volume button on the minus (-) side and get a small pin or needle to tap the reset. While holding the volume it will reset, then tap the power button still holding volume it will bring up a list. Do a factory reset (you lose all data but that's what I would to do to be on the safe side).