Fisher & Paykel E415H not cold but freezer OK?

House power went out and my Fisher & Paykel E415H fresh food compartment doesn't get cold - it is somewhat cool but milk still spoils at even the lowest temp setting. The freezer gets cold but not as much as before. Unit beeps occasionally. Tried to unplug, leave unplugged for an hour and then plugged back in.

How do I remove the white panel in the back of the freezer to check the defrost element? Could the fresh food compartment fan be broken? The defrost heater?

Would greatly appreciate any help. Thanks!