The light from the buttons on the Nokia 5800 can be distracting when watching movies. Fortunately, it is easy to turn off these buttons using a program called LightCtrl.
Step 1
Download LightCtrl here.
Step 2
The program is unsigned. You must get it signed to install it. You will need your IMEI to do this.
Find your IMEI by typing *#06# on the touch keypad of the Nokia 5800.
Using your IMEI, visit SymbianSigned.com and get LightCtrl signed.
Step 3
Transfer the signed LightCtrl file to your Nokia 5800.
Step 4
Using the File Manager(Applications->File Manager), browse to the location of the LightCtrl file and install it.
Step 5
Once installed, open the application and set the Primary Keyboard setting to “Light off”. DONE! In addition, I set the Primary Screen setting to “Control by System”.