Okay, so I have literally no clue about keyboards. I can play the piano and I've had this keyboard for a few years and only started to really use it a couple of weeks ago. It might not be of any use but it says MIDI MK-928 on the front. I came home two days ago and plugged it in, the screen then flashed on and immediately off again. I tried to turn it on and off again and unplug it, I also have another plug for it so I tried it in case the wire was the problem but nothing seems to be working. It's really important that i practice so please help! How do i fix it!