But the game does still not seem to run. Am I doing this corectly?
No, the core options are not part of RetroArch's configuration file. Start the game, then open the RetroArch's menu (RGUI) with F1, go to Options, where you can change the settings as mentioned before. After that, choose the 'Create Game Options' entry to ensure they'll be automatically saved for that game.
Thanks, Isn't it strange that with no SD card inserted it comes right up on the TV? Thats what has me so confused and it used to work fine on my RCA TV. I never have been able to get it working on the Bravia or Samsung. I had done that before, but I used Escher. MAybe that's the issue. I'll flash with the official one.
@xmrdarky Can you please fill in the information as requested here (https://retropie.org.uk/forum/topic/3/read-this-first) so people on the forum can try and help. Each setup can be wildly different and knowing all this goes a long way to assisting. Like @rbaker says, it sounds like it could be a power issue if you are running it just off a USB charger, such as a phone charger, but we wont know unless you give details.
Though not entirely the same configuration (it was a Pi 4), I encountered an issue wherein after the boot sequence the display would be completely blank. I eventually narrowed it down to the memory split setting - I had changed it, trying to follow the instructions for RetroPie 'manual installation.' Keeping it default resolved the problem.