Samsung SGH-E740S Service Manual page 40

Flow Chart of Troubleshooting
9-2. Initial
Check the Battery Voltage
is more than 3.5V
Check U403 pin 14
(32KHz_DIGIT)
Check the 16bit data signal
Initial Failure
Yes
Yes
Yes
Is R224, R225
OK?
Yes
Yes
END
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No
No
Check the circuit related to reset
No
9-4
Change the Battery
Check the U403