That's a tricky one however Pioneer used unified firmware for a range of models updating specific elements of it for various machines as and when required.
As far as I can tell version 1.50 was the last one released with an update for the Pioneer DVR-650H and that was back in July 2007.
So you'll probably have the most recent version anyway. :rolleyes:
- This version is shared by all 2007 1st-half models
- Added "HDMI control" feature (HDMI-CEC)
- The update improves that a black screen is recorded if you stop "Copy Files from a Digital Camera" between 2 minutes before starting a timer recording and stopping a timer recording.