Yes, it is possible to disable Bluetooth on the Samsung QM55C display. Here are the steps to follow:

1. Use the service menu access code:
- Press `Mute`, `1`, `1`, `9`, `OK` buttons on the remote control.
- Then press `1`, `2`, `3`, `4`.
- Select `MRT Option` and then `Bluetooth Support`.
- Select `Turn Off` to turn off Bluetooth. You will have to turn the display off and on again to apply the changes.

2. Use the settings menu:
- There is no direct method to turn Bluetooth off completely via the standard settings menu, but you can remove paired Bluetooth devices:
- Go to the `Settings` menu, then to `All Settings`, select `Connection`, and finally `Bluetooth Devices`.
- Select the Bluetooth device you wish to remove and confirm the removal.

These methods allow you to manage and disable Bluetooth functionality on your Samsung QM55C display.