After a day? Contact Echo customer service, for pete's sake!
“You can reach Amazon Echo Customer Support by phone directly and toll-free at 1-877-375-9365. We're available from 3 a.m. to 10 p.m. Pacific time, seven days a week.”
It could be the power supply which plugs in to wall and has the power cord for Echo connected to it. It is a special PS just for the Echo. Use nothing else. It's $20, but Amazon would replace it if bad. Also, you don't need to replace the speaker if a PS issue.