# Wierd laser start issue

**URL:** <https://forum.onefinitycnc.com/t/wierd-laser-start-issue/7588>\
**Category:** J Tech Laser\
**Created:** [September 6, 2021, 5:39pm UTC](https://forum.onefinitycnc.com/t/wierd-laser-start-issue/7588 "2021-09-06T17:39:20Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Tim.the.tool.man](https://avatars.discourse-cdn.com/v4/letter/t/2acd7d/32.png) [@Tim.the.tool.man](https://forum.onefinitycnc.com/u/Tim.the.tool.man)\
**Post date:** [September 6, 2021, 5:39pm UTC](https://forum.onefinitycnc.com/t/wierd-laser-start-issue/7588/1 "2021-09-06T17:39:20Z")

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This may sound wierd, but when I first star up my machine, and turn on the laser for the first time, it will not work. If I remove the fan wire from the J tech box and plug it in to the second output, then it wil start up. I then move the fan wire back to the port shown in the assemby manual, and everything functions, laser will work until I shut off power to the laser. I would need to repeat the wire swap steps to get it to work again. Any ideas what could be going on?