I've a problem in my fully automatic front load washer that is explained in this video
https://youtu.be/wFKcGBseDgs
As I mentioned in the title of the question, The washer won't power up until I hit it with my hand.
The washer is:
Universal WFT7-22R127-DWH ( May be not popular outside Egypt )
Best Answer
Use a multimeter and check the wiring going to the control board. Look for loose wires and also examine the solder joints looking for a cold solder. You can also go over the connections with a soldering iron and flow them.