Identification
The "F71" flashes on the LCD screen and loud beeps emit from the washer until you press the "Power" button. Remove the error from the screen by pressing "Stop" and "Start" on the washer at the same time.
Effects
The "F71" error means that the user interface has failed. None of the operations may work to power your washer, and the machine will not work.
Prevention/Solution
Check to see whether the laundry drum to the washer moves. If it does move, then the user interface needs replacing. If the drum is locked and will not move, you need to replace the central control unit on the washer.
Considerations
Both of the needed parts may be covered under your Whirlpool warranty. Check with Whirlpool's official website or contact customer service to learn more information about the error.