To all experts: What wrong with my Kenmore Elite dishwasher? The Smart Wash light blinking and the water not drain and I can't get rid of it. How to fix or reset?

Failed control panel is likely cause.

check the positioning of the waste water hose from the pump
it could be kinked from the re-installation, too high to drain or other re-modelling problems

This sounds like a door switch that is faulty on your main door so the system gets a signal saying its not closed properly and there for signals fault

You may want to try:
Press a series of four buttons in quick succession. Press "Heated Dry," "Normal Wash," "Heated Dry" and "Normal Wash" to instruct your Kenmore dishwasher to run a short diagnostic test.
Wait for two minutes while your Kenmore dishwasher runs its diagnostic test.
Press the "Cancel/Drain" button once your dishwasher has completed its diagnostic test. This should reset your dishwasher control panel.
Check to make sure that there's no standing water in the bottom of your dishwasher. Standing water in your dishwasher may indicate that your dishwasher has stopped mid-cycle. You will need to press the "Cancel/Drain" button before you can reset your dishwasher control panel.

try turning breaker panel for that off, and back on. might just need to be reset. If that doesn't work, call the repair man

https://www.google.com/search?q=Kenmore+Smart+Wash+light+will+remain+solid+for+aprox+30+seconds%2C+then+start+blinking

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I had exact same issue. I've called Sears Maintenance. They had to change 2 pieces in UI: Timer KUDS02SRB10 and CONSOLE Assy. Cost 360$ pieces  130$ Job Charge 60$ taxes.
Now It works perfectly, but I bought 1100$ 3 years ago... Really expensive to keep it running.

sounds like wash motor is not going . it will fill and control thinks motor is working . then it will drain wash water / ( drain pump is a different motor ) and then refill and so on .. never washes but fills and drains and heats. ( look for leakage under the motor i'm sure you will find some ..

Look at your manual, usually available on net for reading or downloading. Blink lights are often used to code out a problem with various combinations and repetition rates to indicate trouble code number for look-up in manual.

press back and forth between hi-tempwash and sani rinse several times to get all lights to come on if not then press sani rinse and heated dry back and forth several times. one of though combos will start the test mode. the test mode will stop the light from blinking and you can use the dishwasher again