Macbook Pro Retina will not connect to Panasonic E5 tv through HDMI anymore

When I originally purchased the MBP Retina, it connected to my Panasonic E5 tv without any issues. After an Apple update, now there's just blank black screens on both devices. I've tried all the resets I can think of. Both the MBP and tv are running the latest firmwires. This has been the issue since the end of September 2012.
I've tried the MBP on display models in the shop, and the same problem occured there.
Interestingly, the MBP does connect fine to older tv's (between 3 and 5 years) but not the new one. It also seemed to work on the Sony tv's
Has anyone else found this issue, and managed to resolve it?
Thanks

When I originally purchased the MBP Retina, it connected to my Panasonic E5 tv without any issues. After an Apple update, now there's just blank black screens on both devices. I've tried all the resets I can think of. Both the MBP and tv are running the latest firmwires. This has been the issue since the end of September 2012.
I've tried the MBP on display models in the shop, and the same problem occured there.
Interestingly, the MBP does connect fine to older tv's (between 3 and 5 years) but not the new one. It also seemed to work on the Sony tv's
Has anyone else found this issue, and managed to resolve it?
Thanks

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