Display Does Not Work - Nokia NKC-1X Series Troubleshooting Instructions

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CCS Technical Documentation

Display does not work

Display does not work
Check that phone
powers up normally
(current consumption,
power up sequence)
OK
Check display visually
(possible cracks on
COG driver or glass,
capacitors loose or
broken
OK
Check PWB and
elastomer
connector
OK
Run LCD test in
Phoenix
(BB Self Tests/
ST_LCD_TEST)
OK
Use Display Test
in Phoenix to
check if display
works
FAIL
Replace
display module
Issue 1 02/03
Figure 10: Fault tree, Display does not work
Proceed to phone
FAIL
doesn't power up
troubleshooting
Replace
FAIL
display module
Clean PWB and
replace
FAIL
elastomer if
needed
Check
capacitors
FAIL
C302...C304
OK
Replace
elastomer
Nokia Corporation
Troubleshooting Instructions
In any phase of display
troubleshooting use Display Test in
Phoenix to produce test patterns on
display.
Also check with a known good
display module to see if it works.
Replace
FAIL
capacitors(s)
Replace
FAIL
display module
NKC-1X
Page 19

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