Screen on the K88 Tablet goes to sleep or to black in 5 seconds

Performed factory reset and still having problems.

Look to the right of the screen lock line.  Settings button.

However.  I did this and it did not help.  All this started after the last update.  I may have to factory reset myself.  This is so annoying.

The "keep screen on" from the play store does work. Be sure to turn it on in the upper right corner. Tablet shuts off when I close the case.  Looks like this might be a good work around until AT&T, Android and/or ZTE; patches the patch.

Use  "keep screen on" from the play store it works. renders shut down timer in display setting useless, but until and if AT7T solves the problem it's a good fix.