Nokia 7088 Troubleshooting Manual page 40

7088 (Flower)
Base band Description and Troubleshooting
Display
Faults
Page2
Does LCD display
start?
YES
Display
Faults 3
Page 40 © 2006 Nokia Corporation
Check power IO_VDD (2.95V)
NO
and D_VDD (1.88V). Is each
one OK?
YES
Check power
TFT_VDD_MSMP(2.95V),I s it
ok?
YES
Check/change U20,U21,U22
and FPC connection
J31.Check LCD
signals:TFT_MAIN_CS,TFT_R
S,TFT_WE and LCD_RST, are
they ok?
YES
LCD is defective. Replace
LCD Module board
NO
NO
NO
Company Confidential
Check/change FPC
connection(J41A) and
PM6610
Replace L411 and
retest
Backend IC is
defective. Phone
can not be repaired
and must be
replaced
Issue 1 12/2006