Hello! Thanks for the question. Here are a few ideas:
Downloading the right image: Are you sure you downloaded the right OS image for your hardware? Since you are using a Pioneer edition LIME2, you should download the OS image here: https://ftp.freedombox.org/pub/freedombox/pioneer/freedombox-stable-free_pioneer_a20-olinuxino-lime2-armhf.img.xz
Normally, users can simply download the OS image which corresponds to their hardware here: freedombox.org/download/stable/
Flashing the OS to the SD Card: If you follow the steps in this video exactly as described, then you should be on the right track: https://www.youtube.com/watch?v=Lz2GsLPZd58
Making sure the SD card is plugged in: Sounds simple, but this mistake can happen to anyone. Are you sure that the SD card is inserted into the slot all the way?
Accessing the device: If you’re using Mac or Linux, go to freedombox.local to access your FreedomBox. If you’re using Windows, find your Freedombox’s local IP address on your router’s device map and enter it into your browser (e.g. 192.168.1.8).
Refresh your router’s device map: Sometimes, routers show you all the devices on your local network in a diagram called a “network map.” But when you unplug a device and plug it back in, sometimes the device map does not refresh automatically and fails to display your FreedomBox even though it is on the network. In such cases, try manually refreshing the device map using your router’s interface (since each interface is different, I can’t tell you exactly where the “refresh” button will be).
Let us know if you’ve resolved the issue!