MFD shows No battery level, no Triangle of Death

Hi all,
Ok, have a 2005 that was sitting for over a year. I had to install a new MFD because old one was illegible. Car comes to “ready” but MFD shows no bars on the display. I put the car in drive, Triangle comes on, take it out and put it in park, Triangle goes away.

Btw, I just refurbished another traction battery, which Ive done several times before on other Gen 2’s and swapped it out for the old battery (which I will rebuild). I installed it and know its good. I swapped out the battery ECU to see if the battery monitor would change on MFD but I get the same thing. Would a bad ECU or sensing wire on the orange harness cause this? The connector is fine, no corrosion and so is the ECU. Yes, the orange safety interlock is in and snapped down.
Any thoughts??
Thanks everyone