# MYJG series power supply problem phenomenon

**URL:** <https://forum.cloudray.com/t/myjg-series-power-supply-problem-phenomenon/230>\
**Category:** Laser Power Supply\
**Created:** [April 9, 2021, 9:33am UTC](https://forum.cloudray.com/t/myjg-series-power-supply-problem-phenomenon/230 "2021-04-09T09:33:17Z")\
**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 9, 2021, 9:33am UTC](https://forum.cloudray.com/t/myjg-series-power-supply-problem-phenomenon/230/1 "2021-04-09T09:33:17Z")

</div>

The engraving appears matt.

 ![image](https://us1.discourse-cdn.com/flex020/uploads/cloudray/original/1X/17bde1f9b3afc90f90dfadd62ce95566e1ff4af8.jpeg)  
solution:

1. Short-circuit the G and P of the power supply to eliminate the influence of the industry chiller.

2. The mainboard control laser signal is unstable.

3. The light signal has interference, and the machine is grounded. Otherwise, there is a problem with the power supply itself.