How not to burn board parts with a tester?

Question

Iron

In what position should I turn the button on the multimeter

to test this board from a washing machine?

Answer 1

Judging by the question, you do not know how to use the tester, and therefore you do not have enough knowledge and skills to repair. Contact a specialist.
But as a matter of fact:
1. The tester cannot burn this board, in any way.
2. To understand the whole board or, you need to call its elements. But in order to call the necessary elements, you need to know their initial parameters. In your case, you need to use the resistance scale (omega sign). The first division is the continuity of diodes and short-circuited circuits. The second division is a measurement of the resistance of circuits with a resistance of up to 200 ohms. Third - up to 2 kOhm. Fourth - up to 20 kOhm. Of the resistances, you will not need other values. A voltmeter (V= and V~) checks the voltage (DC and AC).

Answer 2

This is too high a level of magic, carefully collect everything that has not yet been broken and take it to a specialist.