Apple 2009 iMac - Page 44

iMac (21.5-inch, Late 2009) Symptom Charts — Display 44
2010-11-18
5. Shine bright (low heat)
ashlight onto front of LCD.
With computer powered ON
verify if a faint image is visible.
Yes LCD panel functional but
backlight is missing or
dim. Remove LCD panel
and inspect and reseat the
following cable connections:
-Output cable between lower
end of LED backlight board
and lower end of LCD panel.
-Vertical sync cable between
upper end of LED backlight
board and LCD panel.
-DC power cable between
upper right of LED backlight
board and power supply.
Replace any damaged cable.
Reinstall LCD panel and go to
step 6.
X03
No No image or backlight.
Go to step 7.
6. Power ON system. Verify if
image is now visible on LCD
panel with correct backlight
level.
Yes Issue resolved.
No Replace LED backlight board.
Retest. If issue persists, go to
step 7.
M04
7. Inspect and reseat LVDS cable
between LCD panel and logic
board. Power ON system. Verify
if image is visible on built-in
LCD display.
Yes Issue resolved.
No Replace LVDS cable.
If issue persists, replace LCD
panel. Retest.
X03
L03