More than likely it is the computer board. However it can be also caused by the main power switch or the door interlock switch. There is no fuse, the main power supply is part of the computer board. The switches are very easy to check but the front display panel of the dish washer needs to be disassembled as access to the main computer board is required. A multimeter it is also required for the switch verification. Make sure the main power cord of the dishwasher has been unpluged. Removing the front display panel it is not difficult. Once the front display panel is removed you have access to the main power switch and the door interlock switch. Unplug the power cord from the dishwasher and remove the connectors from both switches. Verify continuity on both switches using the multimeter. If you have electronics back ground skills you can also verify if the main computer board has power; for this you need to have both switches connected and the door interlock switch latched. You should be able to measure 110 volts AC on the two wires comming out of the main power switch connecting to the comptuter board.
Good luck!
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