# Laser Not Visible

**URL:** <https://forum.theavr.org/t/laser-not-visible/367>\
**Category:** Technical Support (Official)\
**Created:** [November 8, 2022, 9:32pm UTC](https://forum.theavr.org/t/laser-not-visible/367 "2022-11-08T21:32:12Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![vbigger](https://avatars.discourse-cdn.com/v4/letter/v/9f8e36/32.png) [@vbigger](https://forum.theavr.org/u/vbigger)\
**Post date:** [November 8, 2022, 9:32pm UTC](https://forum.theavr.org/t/laser-not-visible/367/1 "2022-11-08T21:32:12Z")

</div>

We have blinking voltage (about 5v) across the laser pointer pins with a corresponding blinking light on the MOSFET, but no visible laser beam. Is there anything else we can check? Should there be more voltage? THX ahead.

---

<div class="post-metadata">

**Author:** ![Jack\_Ewing](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.theavr.org/jack_ewing/32/29_2.png) [@Jack\_Ewing](https://forum.theavr.org/u/Jack_Ewing)\
**Post date:** [November 8, 2022, 9:41pm UTC](https://forum.theavr.org/t/laser-not-visible/367/2 "2022-11-08T21:41:27Z")

</div>

check that you have the right pins plugged in I would also check that it is getting a signal from pin a4. if that does not work then it might be burned out and you will need a new one