What advanced network diagnostics are useful when basic troubleshooting for "Error 3e3" fails?

When basic steps fail, advanced diagnostics include: 1. **IP Configuration Review**: Use `ipconfig /all` on your PC to verify IP, subnet mask, and DNS settings. 2. **Static IP**: Consider assigning the printer a static IP address to prevent DHCP lease changes. 3. **Router/Switch Log Check**: Examine router/switch logs for errors related to the printer's MAC address or port. 4. **Subnet Verification**: Ensure both your computer and the printer are on the same network subnet, or that proper routing is configured if they are on different subnets. 5. **Network Reset**: In Windows, try a "Network reset" (Settings > Network & internet > Advanced network settings) to reinstall network adapters. 6. **Packet Sniffer**: For IT professionals, a tool like Wireshark can help identify the exact point of network communication failure.