A pointer-only problem is a useful clue
LG’s Magic Remote guidance separates ordinary registration and re-registration when the pointer fails to appear. First check whether arrows and OK still work. A missing pointer and a completely unresponsive remote are different starting observations.
Confirm the TV and remote are compatible and the remote has suitable battery power. Repeating a sequence for an unsupported remote cannot establish a pointer feature.
Use the bounded registration procedure
LG’s UK guide describes pointing at the TV and pressing Wheel/OK after the TV has been on briefly. For the documented pointer-recovery re-registration, it uses Home and Back held for more than five seconds followed by on-screen instructions.
Complete one procedure and check its confirmation before trying another. Mixing several generations’ button combinations makes it difficult to know whether the remote is currently registered.
Test before configuring external boxes
Check pointer movement, directional navigation and a simple menu selection. Only after those work should you evaluate Universal Control of an HDMI box. That is a separate setup with different supported commands.
For support, describe which functions work, the pairing message and the exact remote model. This reports observable behavior without claiming a sensor or radio fault that has not been assessed.
Questions answered
Does a missing pointer prove all remote communication failed?
No. Check arrows and OK separately.
Does re-registering configure a set-top box?
No. External-device Universal Control is a separate task.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.