Check the link before the internet
Connect a computer with a known-good cable and observe whether the adapter reports a physical link. With no link, changing DNS, reinstalling software or resetting the computer is rarely the first move.
A safe check sequence
- 01Use the same cable directly on a known-working router LAN port to confirm the computer and cable first.
- 02Return to the wall socket and record whether the computer shows no link or connected-without-internet.
- 03Without unplugging unknown power equipment, look for a labelled patch lead near the router or shared distribution panel.
- 04Do not randomly connect a room socket to a router WAN port. Photograph labels and the existing layout when unsure.
Sharehouse reminder: do not repurpose a cable that may be serving a housemate. Label, photograph and make one reversible change at a time.
The final step for a gaming PC
Once a link appears, confirm the computer obtains a normal network address and can browse before testing. Ethernet removes some WiFi variables but does not automatically eliminate service, router or local-network congestion.
Include a connection sketch
A simple “wall port - cable - computer/router” sketch with port labels avoids guessing which cable serves which room.
Share the port details