# OLM3 cannot be started **URL:** \ **Category:** Ortur Lasers\ **Created:** [November 21, 2023, 1:24pm UTC](https://forum.lightburnsoftware.com/t/olm3-cannot-be-started/117451 "2023-11-21T13:24:23Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Miro1](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/a183cd/32.png) [@Miro1](https://forum.lightburnsoftware.com/u/Miro1)\ **Post date:** [November 21, 2023, 1:24pm UTC](https://forum.lightburnsoftware.com/t/olm3-cannot-be-started/117451/1 "2023-11-21T13:24:23Z")
One day I turned off the machine, the next day it won’t start. No one touched the machine. LightBurn tells me in the console: error: 8 The Grbl ‘$’ command cannot be used if Grbl is not IDLE. Ensures smooth operation during the job. The machine whistles and does not start. A reboot didn’t help either. Apparently it requires entering a command I don’t know. ---
**Author:** ![berainlb](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/b/85f322/32.png) [@berainlb](https://forum.lightburnsoftware.com/u/berainlb)\ **Post date:** [November 21, 2023, 1:48pm UTC](https://forum.lightburnsoftware.com/t/olm3-cannot-be-started/117451/2 "2023-11-21T13:48:36Z")
I assume this means the machine is not homing correctly. Correct me if that’s not the case. Check that the power supply is working correctly. Can you run this command in Console several times and return the full output? ```auto ? ``` ---
**Author:** ![gilaraujo](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/gilaraujo/32/71745_2.png) [@gilaraujo](https://forum.lightburnsoftware.com/u/gilaraujo)\ **Post date:** [November 27, 2023, 3:07pm UTC](https://forum.lightburnsoftware.com/t/olm3-cannot-be-started/117451/5 "2023-11-27T15:07:55Z")
Can you take a few picture of your belt tensioners on the Y axis? ---
**Author:** ![Miro1](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/a183cd/32.png) [@Miro1](https://forum.lightburnsoftware.com/u/Miro1)\ **Post date:** [December 7, 2023, 5:46pm UTC](https://forum.lightburnsoftware.com/t/olm3-cannot-be-started/117451/6 "2023-12-07T17:46:28Z")
Thank you, the problem is solved, the error was in the wrong connectors, after the replacement everything is OK. ---
**Author:** ![JohnJohn](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/johnjohn/32/37027_2.png) [@JohnJohn](https://forum.lightburnsoftware.com/u/JohnJohn)\ **Post date:** [December 7, 2023, 9:51pm UTC](https://forum.lightburnsoftware.com/t/olm3-cannot-be-started/117451/7 "2023-12-07T21:51:43Z")
Thank you for letting us know. I’m not certain I follow you with wrong connectors. Did they change the wiring? I wish I could see what you see. Please consider sharing a picture to help the next enthusiast solve a problem. 🙂 ---
**Author:** ![Miro1](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/a183cd/32.png) [@Miro1](https://forum.lightburnsoftware.com/u/Miro1)\ **Post date:** [December 8, 2023, 2:53pm UTC](https://forum.lightburnsoftware.com/t/olm3-cannot-be-started/117451/8 "2023-12-08T14:53:14Z")
The main cable was faulty, I replaced it and it was OK. I replaced the cable with a power chain. OLM3 20W > Bloková citace > > ![20231208_125511](https://forum.lightburnsoftware.com/uploads/default/original/3X/7/b/7bb5f03a955536d223fe814d44bd20aad83ea5f5.jpeg) > ![20231208_125619](https://forum.lightburnsoftware.com/uploads/default/original/3X/f/4/f41283667580e1792afae60fc57de539ae73e5e0.jpeg) > ![20231012_153138](https://forum.lightburnsoftware.com/uploads/default/original/3X/a/d/ad325738664591abddc045fbc4fbce2647fa62e5.jpeg) ---
**Author:** ![raels73](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/r/bc79bd/32.png) [@raels73](https://forum.lightburnsoftware.com/u/raels73)\ **Post date:** [January 6, 2024, 6:04am UTC](https://forum.lightburnsoftware.com/t/olm3-cannot-be-started/117451/9 "2024-01-06T06:04:47Z")
So replacing this cable worked? I used my OLM3 last weekend. Did a tightening of the belts today before starting up and the error 8 message appeared. I can’t even get it to home as it is saying The GRBL $ command cannot be used if GRBL is not IDLE. We cleaned the contacts for the cables thinking that maybe they were a little dirty, but that didn’t help, we also loosened the belts back up a little, thinking maybe they were adjusted too tightly. Just wondering if your laser is still working as it has now been 29 days since your last post. ---
**Author:** ![Miro1](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/m/a183cd/32.png) [@Miro1](https://forum.lightburnsoftware.com/u/Miro1)\ **Post date:** [January 19, 2024, 2:03pm UTC](https://forum.lightburnsoftware.com/t/olm3-cannot-be-started/117451/10 "2024-01-19T14:03:12Z")
OK, everything works since changing the cables. ---
**Author:** ![system](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/system/32/64335_2.png) [@system](https://forum.lightburnsoftware.com/u/system)\ **Post date:** [February 18, 2024, 2:03pm UTC](https://forum.lightburnsoftware.com/t/olm3-cannot-be-started/117451/11 "2024-02-18T14:03:14Z")
Closed on February 18, 2024, 2:03pm UTC This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.