Computers Stopped Using Switch for Networking

Check if all three computers network adapters are establishing an Ethernet link, based on the LED indicators available on the GS305E, and where available also on the computer network ports.

Do a factory reset on the GS308E  Use the end of a paper clip or some other similar object to press and hold the Factory Defaults button on the front panel of the switch for at least two seconds. 

If no networking activity established, the switch might be broken.

If in doubt, check and test the three computer Ethernet ports by connecting to your Internet router and temporarily disable Wi-Fi.

If all this does not bring back the switch, head to https://my.netgear.com/ , select your already registered switch (or register now), click on the switch or use  [View Product] and in case [Request Warranty Support]. Follow the guidance, briefly describe the issue, and submit the hardware support request.

NETGEAR Support will contact you via email after reviewing the request.