If the push button is not illuminating it is not getting power most likely because it has a blown fuse or loose wire. Typically you'll want to refer to your wiring documentation. If you do not have a copy of this information please request a copy from your Spindle Support Team.
A few things you can troubleshoot for this issue is below.
- Fuse FU#5 in the Junction Box where the push button is wired
- Checking the wiring that is connected into the Push Button, over time and movement of the button may cause the wiring to become loose from the device
- Check for loose wires on the 4-pin quick disconnect
If after checking these items you're still having issues please create a support ticket with your Spindle Support Team for further assistance.