Hi, pls excuse my poor English, i had bought a new R&S HMO1002 oscilloscope, I used it only for 30 min. and suddenly stopped (no power supply). I tried to restart it but nothing, is lighting up the power button for short time (it should be lit when power is aviable) and a closing/opening relay contact is hearing. It could be from psu ?. It is still in warranty so I cannot open it for the moment.