Standard one Farzad?
If so its easy....
Loosen the two knurled knobs either side of the screen near the indicators...
Then you'll need to undo the 10mm dome head nut on the other end of the thread to the knurled knobs....
Unscrew both , and there'll be another threaded sleeve on the inside that will need to be caught...
Next look at the front of the screen , two small bolts with either allen heads or torx heads ( can't recall)
Undo them, and the nuts behind will fall out of the plastic recess which they sit in..
Then just lift the screen away