Hi there,
For the first issues printing with error messages, I have some inputs here.
Pls try out the steps below to connect to TCP/IP port.
1. Open the Control Panel.
2. Click on Devices and Printers.
3. Right click on the 276dw.
4. Click on Printer Properties.
5. Click on the Ports tab.
6. Click on the Add Port button.
7. In the Available port types box, select Standard TCP/IP Port.
8. Click on the New Port button.
9. Click on the Next button.
10. In the Printer Name or IP Address box, enter thye correct IP Address.
11. Click on the Next button.
12. Click on the OK button. If only one copy of the printer appears in the Device and Printers go to step 22.
13. Delete both copies of the 276DW printer.
14. Click on the Add A Printer button.
15. In the Select a Printer, select the printer with the correct IP Address.
16. Click on the Next button.
17. In the Which version of the driver do you want to use, select Use the driver that is currently installed.
18. Click on the Next button.
19. Click on the Next button.
20. In the Printer Sharing, click on the Next button.
21. Click on the Finish button.
22. If the printer icon is NOT grayed out, go to step 28.
23. Right click on the 276DW printer.
24. Click on See What’s Printing. This will open the Printer Spooler.
25. Click on the Printer menu.
26. Uncheck Use Printer Offline.
27. Close the Printer Spooler.
28. Done.