Replacement Switch Not Giving IP Address

I apologize in advance for this newbie question, I am barely network literate. I have an older unmanaged netgear 100/10 switch that has a direct connection to an Xfinity router/modem. It worked just fine with my older modem, but was speed limited. I upgraded my modem to a gigabit Xfinity device and service and just want to replace the 100mbs switch with a new unmanaged netgear 1000mbs switch. The older switch worked flawlessly when moving from the old modem to the new, but I’m now on my second 1000mbs switch and I can’t get it to work. All I’m trying to do is a direct replacement, slot for slot (both are 16 ports, have about 11 devices). First slot is for the signal from the modem, rest are the computers, game consoles, AV equipment, etc that need internet and ip addresses, but none of them can access the internet after having switched over.

I’ve unplugged the modem for 2-3 minutes, unplugged the switch for 30 seconds, restarted the computer hard wires to the switch, nothing gets me an IP address. Not plug and play for sure. I can go back to the old switch and it all works great, but you know, at its lower speed. What am I missing? TIA