Specifications

LED Cinema Display (24-inch) Symptom Charts — Mechanical Issues 37
2010-02-08
Mechanical Issues
Noise, Hum or Vibration
Unlikely cause: LCD panel, logic board, all-in-one cable, camera
Quick Check
Symptoms Quick Check
Noise, Hum or Vibration
Buzzing noise•
Rattling noise•
Ticking noise•
Squeaking•
Verify display’s USB and Mini DisplayPort 1.
connectors are plugged into known-good
supported system.
Tilt display to hinge limits to determine if 2.
mechanical noise is generated by the hinge
mechanism. Repair/replace mechanism if needed.
Play sound sample at loud and soft volume levels 3.
to determine if noise is caused by the left/right/
subwoofer speakers or the amplier circuit.
Go to Audio Issues symptom code ow
for additional information.
Verify that the air intake/outow vents are not 4.
obstructed.
Deep Dive
Check Result Action Code
Unplug display and disconnect 1.
left, right, and subwoofer
speaker cables from logic
board. Power display ON and
verify if noise disappears.
Yes
Audio issue with speakers or
amplier. Go to Audio Issues
symptom code ow.
No Go to step 2.
Verify ambient temp sensor 2.
cables (for both blower and
LCD) are securely connected
to logic board, and properly
positioned on each part.
Yes Go to step 4
No Reconnect and/or adjust
ambient temp sensor cables
and retest.
Determine if noise issue 3.
sounds like blower is running
abnormally fast.
Yes
Replace blower ambient
temp sensor cable.
P04
No Go to step 4.