![background image](http://html.mh-extra.com/html/samsung/sgh-i550/sgh-i550_service-manual_1190767070.webp)
SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
9-26
This Document can not be used without Samsung's authorization
9-1-9 : Abnormal LCD operation
Check LCD
connector
U602 pin5,6
is high?
Reconnect LCD Connector
Check F700 pin3
signal = 8MHz
YES
Change LCD
Module
Press Power key
abnormal
Normal
Check U602 pin 3
and neighboring circuit
NO
YES
END
Check UCP800
and neighboring circuit
NO