An overlooked Ethernet cable can make a whole home network look broken

An XDA writer says persistent home-network problems survived extensive troubleshooting until the Ethernet cables were replaced. The account singles out flat cables, whose construction can vary, but it does not establish that every flat cable is defective. The practical lesson is broader: before replacing routers or rebuilding a network, test the inexpensive physical links with a known-good cable and confirm the negotiated speed and stability.