Jamie, I had the exact problem you did and here's what fixed it for me;
On your PC, format your sd card using quick format and leave the allocation unit size to whatever is displayed (do not change it to default allocation size).
Then copy just the bin file to the card using USB 2.0 ports on your PC. Insert to the P3 and power up.
Originally I had set the default allocation in quick format and copied with USB 3.0 ports and got the problem you described.
Others have had success formatting the card using the P3 and the Go App instead of a PC. Good luck!
On your PC, format your sd card using quick format and leave the allocation unit size to whatever is displayed (do not change it to default allocation size).
Then copy just the bin file to the card using USB 2.0 ports on your PC. Insert to the P3 and power up.
Originally I had set the default allocation in quick format and copied with USB 3.0 ports and got the problem you described.
Others have had success formatting the card using the P3 and the Go App instead of a PC. Good luck!