Alright, let's have a go at this.......
we will go with the idea that you have investigated and tried tightening the screws to no avail.....
or taken the panel off to see if the clips at the top are out of alignment, or need bent out a little to create a tighter grip....
a few options would be to wrap some electrical tape around the clips for a pad of cushion for a tighter grip, how about a few felt/rubber pads along the edge of the front panel to make it fit tighter....
since you have done this stuff already.....when the front panel is removed, theres two bolts that old the top down, are they tight?
otherwise, have you plugged the unit in?, turned on both faucets?, is machine leveled?, using correct cycle for items washed?, is the lid closed?........think this is a stupid question, I did, when I called GE the other day to request service for my FL washer.....washer lights up, fills and drains water, motor hums.....but drum does not turn......common sense tells me the belt is broken!....and then they wanted to know how I knew the belt was broken inside the machine!...........idiots!