There are actually 4 screws on the fan compartment, as shown by the 4 screw holes on the compartment visible in the second photo of step 7. These two extra screws are located behind the handle, and require quite a bit more work. Remove the 4 screws underneath the top dust filter and cap, then remove the hidden screw under the power button by sliding the power button to on, and then removing the small clip underneath followed by the screw below. This will allow you to access the top of the dust cup, where there are 6 more screws to be removed before you can lift the handle. Finally once you can lift the handle, you can access the two remaining screws on the fan compartment.