EVERYONE needs to STOP guessing.
Do PCM's go out? Sure. But this case, is very random. I would look at the GEM module/fuse first if you truly believe the PCM isn't getting power.
What caused this problem? Most likely out of fuel and now she's a hard restart due to unknown causes.
If she did run out of fuel....
Air in the line.
Pump got hot and is now having issues keeping pressure.
batteries are low. IDM isn't getting proper power to fire the injectors.
Battery(s) cables aren't properly snug.
There are tons of reasons, but guessing will only make the repair more expensive.