Sony C2104 Troubleshooting Manual page 19

Problem Areas
3. If the Side key FPC is defective, replace the Front
Housing LCM TP Assembly.
4. Replace Main PBA.
Note: Calibrate the Touch Panel/P-sensor/L-sensor 1275-0758
Trouble Shooting Application – mechanical.
1273-2281 Rev2
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Troubleshooting Guide (mech)
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