Hi hanksl7878,
The onscreen display buttons on the right hand side of the 2330 computer are used to control the brightness and select the display input source.
- Press any of the 3 buttons on the right hand side of the system to bring up the volume/brightness control icon on the screen.
- Press the second button to select the brightness option.
- Use the first button on the top button to increase the brightness and the second button to decrease the brightness.
- Press the third button is to exit.
Note: The 3 buttons on the right hand side of the system are common for both volume and brightness. Pressing any of the three buttons brings up the volume/brightness menu on the screen. The required option can be selected using the appropriate button.
Please reply for any further help.