I have an XP computer on a domain. I am receiving low connectivity error, I have tested cable from computer to drop (passed) reterminated drop, replaced terminiation from end of drop to patch panel. Tested cable from patch panel to switch. Changed ports on switch. (Same message) Moved computer to another port(connected fine) (So, it's not computer) I toned cables from computer to patch panel to insure correct cable path. This computer has been used all year with no connectivity issues. We have installed new switches recently with cables being pulled through celings. My only ides left is broken wire between wall plated and patch panel. Any other ideas?