Dishwasher dead after part replaced

I replaced a broken door handle latch and got the seven blinking lights when I went to start the machine. Thanks to this forum I learned the code to reseet the machine. The washer started fine and ran through a very long cycle. I opened it after about 2 hours to see if the cycle was done. Steam came out, and it seemed to just be runnning long so I closed the door. The next morning water is pooled in the bottom of the machine and all systems are dead. I checked the circuit box and no problems there. I took the panel off and made sure all connections were solid. I tried the secret codes and got nothing.

So do I call for service, or start replacing parts? Any suggestions?

Thanks
Tim