See Forum Blog post:

Redline Controller Grounding FAQ - Machines (Elite w/ Redline) / Official 1F Elite (REDLINE) FAQs category - Onefinity CNC Forum

T6AL250V 5x20mm 6A 250V Slow Blow Fuse T6AL Glass Slow-Acting Time-Delay Fuse (3/16 in x 3/4 in)

See Forum blog here:

Redline Screen HMI Fuse Spec (FAQ) - Machines (Elite w/ Redline) / Official 1F Elite (REDLINE) FAQs category - Onefinity CNC Forum

Ensure the included and required USB cable between the HMI (Touch Screen) and RealTime CNC Motion Controller Box (Black Box all motors and sensors are plugged into) is properly plugged in.

See Forum Blog post:

Redline USB Cable Connection (no com detected, work offline, alarm state) (FAQ) - Machines (Elite w/ Redline) / Official 1F Elite (REDLINE) FAQs category - Onefinity CNC Forum

The SI board can be mounted on the back of the Redline HMI (Touch Screen).

See Forum Blog post:

JTech Laser SI Board Mount STL - Machines (Elite w/ Redline) / Official 1F Elite (REDLINE) FAQs category - Onefinity CNC Forum