i hear like something's moving when i start it, so i guess it might be the machine.
If you look down into the hopper so you can see the top of the burr (I think there's a nut on top of it) and then turn the grinder on, you should be able to see the nut moving. If so, the grinder hasn't stalled.
i tried turning it anti-clockwise, but nothing happens when i turn it to the extreme as well as to the other side.
As I replied in the other post, you will probably have to remove the hopper by unscrewing the screws inside the hopper. Once the hopper is off, you should be able to remove the upper burr.
Do you reckon its more of a parts problem? It stopped when i was grinding a second time after putting a new bag of beans.
When you say the grinder stopped, what exactly happened? What did you hear, see and smell? Where are you located, it may make it easier to assist if the problem can't be diagnosed over the 'net'. Good luck with it.