The tech support person asked me if I had run any " diagnostics."

技术支持人员问我是否进行了任何“诊断” 。

I called the " tech support" person and they asked me to check my " Ethernet" connection.

我打电话给“技术支持”人员，他们让我检查我的“以太网”连接。

I explained to the tech support person that I couldn't get my email to send or receive.

我向技术支持人员解释说我无法发送或接收电子邮件。