My switch is a TL-SG108E, which isn't listed here but also wasn't listed in the business section -- am I in the wrong forum?

I noticed today that one of the green activity lights on my TL-SG108E switch wasn't blinking, and when I went in to the Switching page of the web interface the corresponding port says "Link Down". In fact there is a PC connected and the link is working fine. Could this be a failure of the patch cable or connector, or is there a problem with my PC's Ethernet interface? I tried moving that cable to a different port on the switch, and that causes the "LinkDown" to move accordingly.