I just ran a software update for Java and MacBook Pro SMC, now my Mini Display Port to HDMI TV is not working. The TV is flickering. The Mac Display is fine.

I was just watching / streaming TV off Safari on my actual TV.
I'm using a Mini-Display Port to HDMI cable for the connection to the external display.
Software update popped-up and said there was an update for Java and for SMC.
I ran the update and upon the computer restarting, my external display (my TV) is no longer working. It is now flickering.
It won't work in Mirroring or set up as an extended display.
I've reset SMC / PRAM / Safe Mode / Even restored from a Time Machine backup (From before the updates were done).
What could it be?!

I keep saying this over and over, in the hope that people who do a search will find it.  Apple cannot possibly test for or be reponsible for the bazillion combinations of adapter, cables, and TV's out there.  The only monitors that are 100% guaranteed to work with the MacBook Pro are the Cinema Displays and Thunderbolt Displays, because, they're made by Apple.  They're expensive, but they work perfectly.
My guess is that you bought a cheap MDP to HDMI cable, or have a defective one.  From my reading of these boards over the past few months, cheap cables have a high failure rate.  And the regular priced ones have only a slightly less of one.  Try a new one.  Make sure you do not damage the Thunderbolt port.

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