Cannot Connect GS105 Switch

[Sandman52]

I am trying to connect my Netgear GS105 network switch. An ethernet cable is connected to my router/modem combo to the switch and the green lights are lit. The yellow cable is connected to my router/modem combo. The two cables (blue and white) are running to a TV and PC but they will not connect to the internet. There is no network connectivity at these devices.  As you can see, the lights are not lit for blue and white cables that are connected to other devices. 

I have verified all ethernet cables do work and they are not faulty. I have tried several different cables as well and still nothing.  I have also plugged the cables into various ports and still nothing. Any ideas on a fix?

[FURRYe38]

Be sure to swap LAN cables with known working cables. CAT6 is recommended.

Netgear has set up a community forum specifically for the LAN Switch products. Most of the people who watch that forum are more likely to have experience with Switch products . Might be more likely to find someone who has a solution if the question is posted there:
https://community.netgear.com/t5/Unmanaged-Switches-Forum/bd-p/business-unmanaged-switches

Please use this link to the main forum product list to review and choose where to make your posts. 
https://community.netgear.com/t5/NETGEAR-Forum/ct-p/en-netgear

Thank you.

[plemans]

Try testing each port with the working "yellow" cable. Plug it into each to ensure the ports work