Samsung SGH-E250D W Service Manual page 32

9-4. Sim Part
Phone can't access SIM Card
SIM400 pin 4,5 = "H"?
After Power ON,
Check SIMCLK Signal on
pin3 of SIM400 in a few second
After SIM card insert,
SIM400 pin 2 = "H(SIMRST)"?
Check the SIM Card
Yes
Yes
Yes
Yes
Yes
END
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No
Resolder or replace U403
No
No
9-7
Flow Chart of Troubleshooting
Check the Clock
Replace PBA