HDMI 8" LCD Screen Kit not working

Hi, I just got my 8" LCD Screen Kit. I’ve tried a couple different ways of powering it and nothing happens on the screen. No backlight, flickering, etc - nothing to indicate that it’s getting power. The keypad doesn’t do anything. Attaching a Pi doesn’t do anything,

I am reading 5v on the drive board from the 5V pin - so the driver is getting power. the keypad is getting 2.5v.

I’ve made sure the ribbon cable is well set and locked in.

What else can I do to troubleshoot?