I learnt my lesson from this. Never go cheap on power supply or any electrical equipments that got fire risk. Bought cheap one forgot what brand years ago from all it. When i was showering at night. Suddenly blackout, went to the db to check the switches. Then i saw something bright from under the door in one of the room using that thing. Opened the door. That thing was on fire. Luckily i was at home that time. Bomba came and said the transformer of that thing might cause it.

Not saying yours is bad. Cheap doesnt mean it is not good. Just check on that brand whether it is ok or not based on feedback.