Second, look in the back of the Panny manual under 'troubleshooting' to see if any similar issues are referenced by the manufacturer. I suppose trying another HDMI cable is not out of the question, but I doubt that's the issue.
Another forum to ask in would be avsforum.com, before committing to a service ticket and/or $$ w/ Panny.
plugged in the blu ray player to wall ac power and through an hdmi cable to HDMI on a panasonic tv. After pushing power on the remote, blu ray player displays on the tv, turns to a three colored screen with no display, then tv turns black. there is no "no signal" display so there for the signal is being received, but set up screen will not display.