The ping problem might caused by the firewall of the PC, you can check that first. I‘ve met that before.

Hi Bambinotenchie, If you have paid attention to the Jetstream Switch product line, you may have noticed that there‘s a new model called T2600G-28SQ. That is the alternative model for TL-SG5412F. It...

Hi EpicLPer, maybe the switch is striked by ESD? you can also seek help from the technical support team besides Amazon.