Keyboard troubleshooting
Keys troubleshooting
Troubleshooting flow
Power key troubleshooting
The power key has a 10K pull-up resistor to VBAT and is normally high. A low level voltage should happen
when the key is pressed, and if this is long enough, the phone should turn ON if it is OFF and OFF if it is ON.
Check for mechanical damage to the outer button, stuck or misplaced gaskets, broken switch, liquid
contamination or broken solder pads or joints. Repair if possible.
Electrical tests, measure:
RM-609
BB Troubleshooting and Manual Tuning Guide
Issue 1
COMPANY CONFIDENTIAL
Page 3 – 31
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