Dell U2713H REV4 USB 3.0 not working.

I've purchased the monitor 3 months ago and the ports were working well. However yesterday, it just stops working, tried plugging in my external HDD, mouse and keyboard and non were functioning. However, I'm certain that there's power (maybe from the monitor itself), as my external HDD  light were up but it's not reading anything and the lights went off itself after about 30 seconds. Couldn't be the problem of not having enough power, did not shift my cables since I used this monitor. However, I'm able to charge up my phone (not being able to load my phone as well). Tried power cycling, re-plugging the upstream and downstream wire but to no avail (should there be a notification sound when I plug in the upstream cable). Is my monitor faulty, it's not even half a year