**Fault Analysis:** The main cause of the fault is either poor operation of the computer board or a fault in the power circuit.
**Data Source:** Beijing Whirlpool Washing Machine Repair Center, http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3476390.
**Fault Inspection:** After turning on the machine, there is no display on the computer board composed of the microprocessor. Use a multimeter to measure whether there is 220V AC voltage in the input circuit. Measure the yellow and orange plugs and find that there is no 220V AC voltage. At this point, use the multimeter to check whether there is 220V AC voltage at the incoming end of the power switch, and check if the power switch is on and if the contacts are well connected. If the power switch is on and the contacts are good, it could be due to loose or poor contact of the connectors, or possibly a fault in the computer board. If adjusting the connection of the connectors and improving the contact points still fails, it can be determined that the computer board is faulty and needs to be replaced. The inspection result shows that the power switch is not conducting. After replacing the power switch and testing by turning on the machine, the washing machine works normally, and the fault is eliminated.
**Whirlpool Washing Machine Operation Disorder and Abnormal Display During Operation**