Your system came with probably outdated Bios. There are new versions and it seems that some of these latest firmware updates have enabled more devices (tv tuners for example).
- Fixed: Backlight sometimes turned off when resuming from S4
- Added TV cards in whitelist
The previous version (24CN24WW) had:
- Added LCD panel brightness table auto detection function
- 2. Added CPT panel brightness table
Latest bios update as of this moment is:
Make sure to plug the power cable or else you won't be able to perform the update.