I have a Samsung Galaxy Ace 2x (GT-7560M) and some issues. A few days ago I noticed that the power/lock button on the side is not responding anymore. I looked up a couple things and tried pulling out the battery and re-inserting, but the power button will not do anything. The only way I can boot up my device is to pull the battery, plug in the powered USB, then re-insert the battery. The power button still will not respond however. I have had issues with this model before and got it replaced about 5 or 6 months ago for similar issues with the either the home or power buttons. Now I have a feeling that this is just a faulty device in all. Are these known issues with this model of phone and if so are there any fixes available?