Flashed OS - did not reboot

Now I can't connect with the standard or the wifi IP from before updating. I let it sit overnight, rebooted this morning, rebooted with new OS on microSD chip. Nothing works.

What to do?

Update...I CAN upload and execute sketches. Just can't talk to it using the web browser.

Resolved. I was able to connect using ethernet. I reflashed. Back to normal.