Gen2 bricked CM, ECU, or Hybrid battery?

2008 sat unattended in garage for 2 weeks.
On return it would not start or go into ACC.
Dash is dead. Could this be a hybrid battery gone dead?
If it was left with 1 or 2 bars on the hybrid battery charge level, could the hybrid battery gone bad and be causing the following symptoms?

When the power button is pressed with a working key fob inside the car nothing happens:
No green LED on start button.
No starting of the car.
No going into ACC mode.
No Ready indication.
No display on the dash (Combination meter items like fuel gauge, odometer, gear, speedometer AND no Maint reqd, check engine, TMPS, ABS, key in car, airbag, or Triangle of death flash).

Things that do work:
Horn
Headlights
Brake lights
Open door icon
Internal cabin lights
12V battery (verified good)
+++ No key icon (when tried without key inside the car) ***
Door lock/unlock by remote AND by buttons on door

Other Info:
As stated the 12V battery is good.
Both remotes have new batteries and can lock/unluck doors, will trigger "no key" icon when try to start car without them inside the car.
AM2 fuse is good.
Fusible links in the engine compartment fuse box all look good.

 

12V was determined as good by several methods. Took it to Auto Zone for testing. Swapped it with a battery from a working 2008 Prius - the working Prius continued to work. The bricked Prius with the battery from the working Prius continued to show no signs of life.

CR2032 in BOTH remotes are new and at 3.3V. Also both remotes remotely open and close doors. When a remote is inside the car it does NOT flash the "no key detected" warning. When there is not a remote inside the car, it does flash the "no key detected" warning. Plus physically putting the remote in the slot does not change anything.

 

I guess I'm not sure what or where the "safety fuse for the hybrid traction pack" is. But if it's the fusible link in the engine compartment fuse box - it looks OK. See attached pic.

It won't go to ready mode. When the power button is pushed there is no noise and no lights/LEDs on the dashboard.