Samsung DMT 400 dishwasher. There is power at the dishwasher but power button does nothing

A Samsung Dishwasher flashing the Quick light indicates a Water Supply Error (Not Enough Water) has been detected by the internal electronic diagnostics.
https://appliancerepairinfo.com/samsung-dishwasher-quick-light-flashing/

There are a couple or reasons that this might be happening. One is the heating element in the bottom ALSO heats the water to a higher temp. If it is burned out, that can cause the issue. Another is the fill valves may have screens on them that are full of debris.
The last would be the control panel and it is not cheap.

usersmanualguide.com

It seems like defective control board and it is not cheap repair ,buying cheapest model new dishwasher could be good Idea

Hi Ben, Ive sent you A copy of the manual.

please follow this steps and fix it. God bless you

Heating Element

If lights are flashing on the control panel, the heating element might have burned out. The heating element heats the water up to operating temperature. After a set amount of time if the temperature isn't reached a light on the control panel might start flashing. The heating element can be checked for continuity with an Ohm meter.


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Heating Element Assembly

If lights are flashing on the control panel, the heating element assembly might have burned out. The heating element assembly heats the water up to operating temperature. After a set amount of time if the temperature isn't reached a light on the control panel might start flashing. The heating element assembly can be checked for continuity with an Ohm meter.


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Check Fault Codes

If the display lights are flashing and there is an error code in the display window, check the wiring diagram and tech sheet in the dishwasher that will provide information on the fault.

Drain Pump

If lights are flashing on the control panel, the drain pump might not be working properly. For two-wire drain pump motors check them for continuity using an Ohm meter. If it's defective You'll need to replace it. Drain pumps are not repairable.


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Touchpad and Control Panel

If the lights are flashing on the display the entire touchpad and control panel assembly might be defective. If the display works but the dishwasher functions are all out of synch, or some of the buttons don't respond properly the entire touchpad and control panel might need to be replaced.


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Touchpad

If the display lights are flickering for no reason, the touchpad might need to be replaced. Sometimes when the touchpad is defective the display lights are flashing randomly.

I know this is old, but I had the same thing happen to me (exactly as mentioned) and what worked was to replace the control panel. Fortunately, I had a spare I bought several years ago when I thought that was the problem to another issue which was solved without replacing the control panel. Instead of returning it, I kept it and it came in handy since it's either too pricey now or difficult to find. But that did it for me. I did everything to this dishwasher and already had a replacement picked out because nothing was working. Before doing getting a new one, I thought why if the issue was not the dishwasher. So I checked the hose and made sure no quinks or obstructions. I then checked for particles on the motor. Before that, I cleaned out the filters and replaced the check valve. I confirmed the motor was pushing out the water at a good pressure. Everything was fine. What turned out to be the problem was not anything to do with the drain but the control panel. I usually don't write comments, but I hope this helps someone.

By the way, wrap your control panel chip with plastic and put cotton inside to absorb moisture. The plastic will prevent the condensation from ruining the panel chip. I know this because I replaced my first control panel due to condensation/moisture/steam - whatever you call it coming out of the dishwasher. After doing this, it lasted until the blinking delicate light which isn't due to moisture. I will never again buy a Samsung dishwasher or any of their kitchen appliances.

Hello Randy Lowe,

There is an EXPECTED INITIAL failure period
on new equipment...!!

Use your warranty...

Brand new = Take it back & get a GOOD ONE.

Carnac the Magnificent

on the bottom of the dishwasher, under the door there is like another panel accross the bottom, pull this off, and you should see the legs for the dishwasher. they might be small one that u need to turn to adjust the height. hope this helps. good luck

http://www.youtube.com/watch?v=dKdP7Fp5XEI

http://www.thisoldhouse.com/toh/how-to/step/0,,20076102_20174094,00.html