# The laser is not engraved, but the laser beam can be seen on the back. How can I solve it?

**URL:** <https://forum.cloudray.com/t/the-laser-is-not-engraved-but-the-laser-beam-can-be-seen-on-the-back-how-can-i-solve-it/266>\
**Category:** FAQ\
**Created:** [April 16, 2021, 5:08am UTC](https://forum.cloudray.com/t/the-laser-is-not-engraved-but-the-laser-beam-can-be-seen-on-the-back-how-can-i-solve-it/266 "2021-04-16T05:08:01Z")\
**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, 5:08am UTC](https://forum.cloudray.com/t/the-laser-is-not-engraved-but-the-laser-beam-can-be-seen-on-the-back-how-can-i-solve-it/266/1 "2021-04-16T05:08:01Z")

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Consider the problem of the optical path, whether the optical path has shifted. Test whether there is laser output from the laser tube light outlet (can use paper shell acrylic and other materials), if there is no laser output, it should be a laser tube problem.