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The blinking crystal wash light is an error code which means that the touch control panel has failed. The entire touch control panel will need to be ordered and replaced to resolve the issue. You can try to reset the circuit breaker to see if the electronics will reset and if that doesn't work there is nothing you can do but replace the touch control panel.
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Unfortunately I can't control what fails on your dishwasher. This is not a free service, it would have cost you $100 to call a technician out to tell you the same thing so please understand the deal you're getting here.