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?