Thunderbolt Display doesn't turn

hi there, here is the issue, i got a MB-P 15" late 2013 (from work) and a TBH 27", recently doesn't turn on the display when the cable is connected, i have tried with others MBP from my mates, and is the same story, doesn't work, the charger cable if it works but the mini display port doesn't, ( funny thing is that light of the mouse turn off when the display port is connected).
what could be the problem?

I am having a similar problem with a 15" MacBook pro with retina display.  I got it working once after resetting the SMC and the the PRAM (Internet search for instructions).  Howerver I have not gotten it to work again so I would be curious if this solves your problem.

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