Troubleshoot 2019 Carado Banff LED strip lights

[Macodiva]

Hi
Anyone have any advice on what could be wrong & more importantly how to fix the interior strip lights in a Carado Banff?
Blue light comes on on the control panel but no light from the strip itself.
One day they were working, next morning they're not.
Dimmer is not on low.
Fuse is good.
Push on under cabinet lights work fine.
Any help appreciated, thanks