When the press is pressed down, the pressure bar does not fully fit the plate to be tested, how to deal with it?

First check whether the pressure bar screw is locked,

First check whether the pressure bar screw is locked, whether the other pressure bar screws are fastened without falling off, whether the pressure plate is evenly distributed on the plate to be tested, and observe whether the electronic components are pressed. If the electronic components are pressed, the pressure bar needs to be removed. Observe whether the length error of the pressure rod is too large or too short. If it is too long, it needs to be replaced with a new pressure rod. If it is too short, a gasket needs to be added to the screw of the pressure rod to make the pressure rod flat against the PCB after pressing down