Specifications

LED Cinema Display (24-inch) Symptom Charts — Display Issues 24
2010-02-08
Verify that the LCD function 4.
interface cable and LED driver
cable connections are secure.
See Functional Overview.
Yes If connections are OK and
secure and the display is still
blank, go to step 5.
No
If cable is damaged,
replace all-in-one cable or
replace function cable.
L14
Shine bright (low heat) 5.
ashlight into the front of the
LCD. Verify if an image is being
displayed.
Yes Image present but backlight
is not ON. Go to step 6.
No
Replace LCD panel. L03
Verify voltage on logic board 6.
between test point TP81
(24.5VDC) and chassis ground
(GND) is 23.3–25.7 VDC.
Yes LED backlight power present.
Replace LCD panel.
L03
No
Poor or no LED backlight
power at logic board.
Replace logic board.
L07
Noise / Unstable Flicker
Unlikely cause: blower, subwoofer, speakers, camera, microphone
Quick Check
Symptom Quick Check
Noise / Unstable Flicker
Image icker•
Audible noise•
Verify display being used with supported system.1.
Verify USB/display/power connectors are fully 2.
seated.
Use with known-good system. If used as second 3.
display, check display preferences to see if display
is recognized by system.
Verify known-good source sound le not causing 4.
speaker distortion.
Deep Dive
Check Result Action Code
Verify if issue is due to video 1.
ickering coming from display.
Yes Suspected ickering issue.
Go to step 2.
No Audible noise issue.
Go to step 8