LD5/6 off after appling power, normal?

In ‘002-Connecting the printer’ LEDs LD5 and LD6 are on after USB is connected. After applying 230V to the power supply both are off. When 230V is removed both LEDs are on again. Is this normal behavior?

yes, this is normal, but when you connect with repetierhost, they whil blink all the time

Correct they only light when there is USB communication