I wouldn't really call this dark screen of death.
What actually happened is your phone has the newer LCD hardware which LG switched to mid-production. The older ROMs like ZV8 and ZV9 do not have the drivers for the newer LCD hardware. Thus you will notice they will boot with ZV8/ZV9 and be functional (including the touch screen), except there will be no visual feedback.
This is actually covered in a
RED warning at the top of the first post.
If your purpose was to get a stock ROM with hotspot working, the last ROM that would allow that and work with your LCD is ZVC. You can get the substitutions for that in the Reference section at the bottom of the first post.
To get by the current issue of not having screen output, I suggest either you use Android Screencast (link in the first post) or do some operations "blind"
Update yourself to the ZVD full restore:
http://forums.androidcentral.com/lg...sprint-zvd-froyo-downgrade-now-available.html