ILS indicator stuck centered in the HUD, but working on TV

[Sylosis]

See screenshot. I don't understand why my TV shows what seems to be correct ILS indication, but my HUD is showing it dead centered, where I'm clearly completely misaligned. 

Nevermind, I think I found a switch I needed to flick as well.

[Ivandrov]

Both the HUD and the VDI have separate ILS/ACL switches.