# The power supply device makes a huge noise and malfunctions and causes the laser to emit (pulse) by itself, which is very dangerous. It can also work when the power is turned on. Power DY13

**URL:** <https://forum.cloudray.com/t/the-power-supply-device-makes-a-huge-noise-and-malfunctions-and-causes-the-laser-to-emit-pulse-by-itself-which-is-very-dangerous-it-can-also-work-when-the-power-is-turned-on-power-dy13/271>\
**Category:** FAQ\
**Created:** [April 16, 2021, 6:32am UTC](https://forum.cloudray.com/t/the-power-supply-device-makes-a-huge-noise-and-malfunctions-and-causes-the-laser-to-emit-pulse-by-itself-which-is-very-dangerous-it-can-also-work-when-the-power-is-turned-on-power-dy13/271 "2021-04-16T06:32:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Technician](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.cloudray.com/technician/32/15_2.png) [@Technician](https://forum.cloudray.com/u/Technician)\
**Post date:** [April 16, 2021, 6:32am UTC](https://forum.cloudray.com/t/the-power-supply-device-makes-a-huge-noise-and-malfunctions-and-causes-the-laser-to-emit-pulse-by-itself-which-is-very-dangerous-it-can-also-work-when-the-power-is-turned-on-power-dy13/271/1 "2021-04-16T06:32:13Z")

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The laser power supply is making noise (maybe the fan has touched the inner wire). Is the laser power supply automatically emitting light when the machine is not moving? You can try to unplug the laser port terminal on the motherboard. See if it will shine again.