# Controller not operating **URL:** \ **Category:** ❓ Something's Up\ **Created:** [July 29, 2026, 10:31pm UTC](https://forum.sienci.com/t/controller-not-operating/26802 "2026-07-29T22:31:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![best49erfan](https://forum.sienci.com/letter_avatar_proxy/v4/letter/b/4bbf92/32.png) [@best49erfan](https://forum.sienci.com/u/best49erfan)\ **Post date:** [July 29, 2026, 10:31pm UTC](https://forum.sienci.com/t/controller-not-operating/26802/1 "2026-07-29T22:31:21Z")
I have a custom built machine with a superlongboard. It has been great until the other day. I went to turn it on and hit connect, and it shows connected on left side but disconnected in middle of screen. I hit the estop and reset it and the leds lit up and then faded off. I disconnected all wiring but the usb and the estop and the issue persists. I reached out to Science Labs and they say they cant support due to custom machine. I feel that the controller has failed and should be supported. Any ideas what I can do? ---
**Author:** ![Chucky\_ott](https://forum.sienci.com/user_avatar/forum.sienci.com/chucky_ott/32/8692_2.png) [@Chucky\_ott](https://forum.sienci.com/u/Chucky_ott)\ **Post date:** [July 29, 2026, 11:21pm UTC](https://forum.sienci.com/t/controller-not-operating/26802/2 "2026-07-29T23:21:39Z")
@best49erfan did you go over these troubleshooting steps: [SLB or SLB-EXT - No Power on the Control Board – Sienci Labs](https://sienci.zendesk.com/hc/en-us/articles/43720373247124-SLB-or-SLB-EXT-No-Power-on-the-Control-Board) ---
**Author:** ![best49erfan](https://forum.sienci.com/letter_avatar_proxy/v4/letter/b/4bbf92/32.png) [@best49erfan](https://forum.sienci.com/u/best49erfan)\ **Post date:** [July 31, 2026, 1:10am UTC](https://forum.sienci.com/t/controller-not-operating/26802/3 "2026-07-31T01:10:17Z")
I have. Everything is working again but the spindle. I checked the vfd by putting it in local cntrol and that works, but cannot get the rs485 to work.