quiet partner II

I have a whirlpool quiet partner II dishwasher. model #DU1100XTp83, black.w
When we first got it , they had to replace the computer module. For the past few weeks it has done various things. The child lock will automatically go on and won;t release. it won;t start. it stops in the middle of the cycle and won’t finish.
Right now, it will not turn on. I have tried pushing hard on the door to make sure the latch is secure (this has worked in the past) and also tried pushing two buttons back and forth to reset it, but it doesn’t do anything. It will not light up any cycle, but the heated dry light will flash one or two times, then shut off for a few minutes, then do it again. I can get the machine to drain (there is no water in it) but none of the other buttons work or light up. What to do?