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One simple diagnostic would be to re-enable the PING feature and see if the terminal starts responding to PINGs of its IP address.
I also like to use Windows PowerShell: "tnc 192.168.1.10 -Port 44818" will check to see if an EtherNet/IP stack is running.
You might also try to reset the terminal's communication drivers to default; sometimes folks download a driver set that deletes the EtherNet/IP driver.
Start from the basics: verify that you get a link light, verify that you're connected to a simple switch and not a router or VLAN port, verify that your computer's network interface adapter and the PV+ terminal are on the same logical IP subnet.
And again, welcome to the PLCTalk forum community ! It's a sunny Saturday and I've got a power washer and a to-do list...