MacBook Pro 10.5.8 no longer displaying on panasonic tv

I hooked up my MacBook Pro to our Panasonic HDTV with a HDMI cable recommended by a staff person in the Apple store, and it worked fine for several months. We watched a lot of Netflix, no problem.
Then recently, the laptop stopped displaying on the TV. We unplugged and replugged the cables, restarted the computer, tried different "input" settings on the TV, tried different display settings on the laptop (current setting: 1440x900, millions)... no luck.
When I try to display the laptop on the TV, the laptop screen briefly goes blue, like it's trying to respond, but then it never actually seems to connect to the TV. The regular screen comes back onto the laptop, but the TV screen stays black.
We miss being able to play Netflix on the TV...thoughts?
Katie

Hmmm, can you get to System Preferences>Displays & try a different resolution?
Is anything showing on the Laptops screen?

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MacBook Pro 10.5.8 no longer displaying on panasonic tv

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