Hey guys I'm new here but have lurked the pages a while. Did a search and just can't find help for my problem. I just bought a used ebang ebit9+.
This model isn't very popular, throughout my years of mining bitcoin, I have only seen the name maybe two or three times, so the odds of you finding a solution here or elsewhere are pretty slim, you should either contact ebang or return the miner.
The problem you are describing seems like a bad firmware/control board, it's pretty hard to troubleshoot with the amount of info you provided, what do you mean by "it won't connect" does it show connection refused or the page was not found or what do you see exactly? also what happens when to ping the miner?