Techman

@Javi
I finally got it working. The esiy wifi was connecting to my guest network which blocked it from my main network, which is why it didn't show up. The wired connection was properly connecting to my main network.
Javi, thank you for all your help. It's much appreciated.
 

You can use any 12V 2A power supply. You can also purchase from UD:
https://www.universal-devices.com/product/12v-1a-power-supply/

Here it is.
 
 

The ISY994 supports a 32gb SD card. I'm currently using one as are many other forum members.
The following is from the link you provided.
"The ISY994i takes a MicroSD card. The max size is 32GB. Please look for a card with the newer A1 rating (A2 also works, but will fallback to A1 because the ISY994 does not provide hardware support required for A2). All other process steps below remain the same.]"

Some things to try:
     Check your ethernet cable.
     Check the ISY power supply voltage.
     Reboot the ISY
Do you have a PLM plugged into the ISY?
It's possible that the SD card is not seated properly or is defective
 

@DirtRoad
Try removing power from the PLM and the ISY, then power up the PLM, wait about 15 seconds then power up the ISY
If your able to access the ISY via the admin console on your LAN then the router is not the issue.

After the upgrade did you delete your java cache, including applications and then download the ISY Launcher. The correct link is below.
https://isy.universal-devices.com/start.jnlp