maemo.org - Talk - Notification light and keyboard light stopped working

Try these steps posted on http://www.nokiatimes.com/2010/10/no...oard-back.html

Switch off the device.
Open the Phone.
Take the battery off.
Connect to Power (Yes keeping the battery out).
You should get a blink of light on notification LED.
Then disconnect power.
Put the battery back and close the phone.
Switch On the device.

You should be all set !

If this does not work, try creating a small script to test the keyboard back lights out.

(Original post here - http://talk.maemo.org/showthread.php...950#post632950)

The backlight under the keyboard is provided via 6 indepedent lights. Control and status information for those lights are found in /sys/class/leds/lp5523:kb*

ls -l /sys/class/leds/lp5523:kb1/
-rw-r--r-- 1 root root 4096 Dec 20 02:34 brightness
lrwxrwxrwx 1 root root 0 Dec 20 02:21 device -> ../../i2c-adapter/i2c-2/2-0032
-rw-rw-rw- 1 root root 4096 Dec 20 02:22 led_current
drwxr-xr-x 2 root root 0 Dec 20 02:21 power
lrwxrwxrwx 1 root root 0 Dec 20 02:21 subsystem -> ../../leds
-rw-r--r-- 1 root root 4096 Dec 20 02:21 trigger
-rw-r--r-- 1 root root 4096 Dec 20 02:21 uevent

The following loop sequentially sets the brightness of each of the 6 lights located under the keyboard to 255 (i.e. on) and then back to 0 (i.e. off). If you do it in the dark, you should see the position of each light.

backlights.sh
Code:
#! /bin/sh
for i in 1 2 3 4 5 6 ; do
echo 255 > /sys/class/leds/lp5523:kb${i}/brightness ;
sleep 1 ;
echo 0 > /sys/class/leds/lp5523:kb${i}/brightness ;
done