Illumination troubleshooting
Troubleshooting flow
S60 keyboard backlights are controlled by the Ambient Light Sensor. They are supposed to be illuminated
only in dark ambient light. At first, cover the ALS and check if they are OK. If they are not, go to the
troubleshooting diagram below.
RM-484; RM-485; RM-486
BB Troubleshooting
Issue 1 COMPANY CONFIDENTIAL Page 3 –35
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