No display after replacing charging assembly and antenna wire

Verizon Note 3 seemed to have a bad port (sketchy/slow charging) so I replaced the charging assembly and antenna wire. Phone seems to start and run but now there is no display.

What did I do wrong?

UPDATE - Actually, I solved this on my own. It was 'pilot error' if you will. In removing the back plate, the connector in the upper right corner of the mother board had adhered to the cover and became disconnected. The loose component had always bothered me (no, I didn't look at the bottom of it or I would have seen that it's a connector) but it reminded me of a discrete component I'd seen in the early days of solid state electronics. Thinking back, I remembered that the back plate/cover being reluctant to release in that upper right corner when I removed it. It was at that point that it probably unplugged. I was struggling with the antenna wire connectors at the time. but, as I said, it had bothered me. I opened the Note up one last time and discovered that it only had to be plugged in. Success. Haste makes waste!

Grammar checking? Seriously? As an ex-engineer, I typically tell you how the watch was made if you ask the time. But, after encountering character count limitation on many reply boxes, I now keep my questions brief. I'll admit that this post was vague and, for that, I apologize. At any rate, all is well. Thanks for the opportunity.

Thanks,

DD