The Start button is broken, the user interface board is not working, or the machine/motor control board is out. Perform the diagnostic test to verify all machine functions. The Start button is indeed broken if machine functions work fine during the diagnostic test.
Put the machine in standby mode by plugging it in with all indicators off, or with only the Clothes Clean or Done indicator on. Select any one button except POWER, START, and STOP then follow the steps below, using the same button.
Press/hold for 3 seconds, release for 3 seconds, press/hold for 3 seconds, release for 3 seconds then press/hold for 3 seconds and release. All indicators on the console will be lit for 5 seconds with 88 showing in the Estimated Time Remaining two-digit display to indicate that the diagnostic mode has been entered successfully. If indicators do not display as described, the press/hold and release procedure may not have been performed within the time frame necessary for successful entry. Repeat the procedure and you may use another button to ensure this was not the cause.
The program then checks for saved fault codes. Post back any saved fault code for further advice. If there are no saved fault codes, all indicators on the console will momentarily turn off, then turn back on with 88 displayed and after 5 seconds, the diagnostic test begins with C0 displayed and the lid may be opened. Press the same button used in activating the diagnostic test above to advance through automatic test steps. Allow step C1 to complete before advancing to the next steps. Post back the result fro further troubleshooting advice.