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If I hold down power button for awhile, the backlight will come on and go off immediately and it will vibrate a little during this process …but no logo or battery icon, even after leaving on charge for awhile.

Hi @wizard870 , There’s no easy way around it. If you performed the screen replacement, you’ll have to go back and check your work to verify that everything is how it should be. You wouldn’t be the first to have overlooked something. Here’s a link to the ifixit Samsung Galaxy Tab 4 7.0 Screen Replacement guide that may be of some help. If someone else performed the screen replacement, tell them of the problem with the tablet