Apple led cinema display 27inch User Manual

							LED Cinema Display (27-inch) Take Apart — Glass Panel 61 2010-11-18
3 Set unit in upright 
position to minimize 
settling of dust.
4 Roll silicone roller over 
LCD panel to remove 
any particles.
5 Remove glass panel 
from microfoam bag.
6 Clean INSIDE of glass 
panel with the silicone 
roller to remove dust. 
 
Note: If fingerprints 
or oils are on inside of 
glass, clean first with a 
microfiber cloth made 
damp with water.  
						

							LED Cinema Display (27-inch) Take Apart — Glass Panel 62 2010-11-18
7 Wearing clean gloves, 
place glass directly 
onto unit. Magnets will 
catch glass panel and 
hold it in place. 
 
Make sure pull tabs at 
bottom of LCD panel 
are tucked behind 
glass panel.  
 
Glass should be flush 
with rear housing after 
it is reinstalled.
 
8 Clean outside of glass 
panel with a clean 
microfiber cloth.  
Wipe glass until there 
is no longer any 
residue or haze.
9 Inspect glass for 
any remaining dust, 
fingerprints, or a hazy 
residue.  If there are 
contaminants trapped 
between LCD panel 
and glass panel, repeat 
cleaning procedure.  
						

							LED Cinema Display (27-inch) Take Apart — LCD Panel 63 2010-11-18
First Steps
Remove:
• Glass Panel
Caution: Do not press on 
front surface of LCD panel 
when handling.
Important: When 
replacing the LCD Panel, 
use the EDID Reset Tool.
Tools
• ESD wrist strap
•  Torx T10 screwdriver
•  ESD bag to store LCD 
panel
LCD Panel  
						

							LED Cinema Display (27-inch) Take Apart — LCD Panel 64 2010-11-18
Removal
1 
Remove T10 screws: 
(12) 922-9348 
Reassembly Note:  
Do not overtighten LCD 
screws, which could cause 
light leakage after unit is 
reassembled.
2 Using black tabs, raise 
bottom edge of LCD a 
few inches to access 
cables inside.
CAUTION: Tilt display up 
no more than 4 inches 
(10 cm).  Pulling display 
too far could damage 
cables or connectors.  
						

							LED Cinema Display (27-inch) Take Apart — LCD Panel 65 2010-11-18
3 Looking into gap under 
LCD, disconnect 4 
cables:
•  #1: DisplayPort
•  #2: function
•  #3: ground
•  #4: LED backlight driver
Reassembly Note:  
Verify that all cables 
are firmly seated into 
connectors. An unsecure 
cable connection can 
cause image flicker.  
 
 
LEFT: Close-up of #1 
DisplayPort cable on back 
of LCD panel. Peel back 
mylar and foil tape, 
squeeze sides of connector 
and pull out.
RIGHT: Close-up of #2 
function cable at top left 
of logic board. Squeeze 
sides of connector and pull 
straight out.
LEFT: Close-up of #3 
ground cable at top left of 
logic board. Remove T10 
screw from top left corner 
of logic board.
RIGHT: Close-up of #4 LED 
backlight driver at center 
right of logic board (view 
from underneath board). 
Pinch underneath and pull 
straight out.  
						

							LED Cinema Display (27-inch) Take Apart — LCD Panel 66 2010-11-18
4 Lift LCD panel off rear 
housing.
5 To prevent buildup of 
static charges which 
may attract dust 
particles to the surface 
of the display, store 
LCD panel in an anti-
static bag whenever 
it has been removed 
from computer.
 
Replacement Notes:
•  A new LCD panel 
includes a new temp 
sensor cable and the 
built-in LED backlight 
driver cable.
•  The function cable 
and ground cable 
(shown at right) must 
be transferred from old 
LCD panel to new LCD 
panel.
•  A new LCD panel will 
already have foil and 
mylar tape installed, 
which will need to 
be peeled back when 
transferring function 
cable.  The LCD panel 
will come with extra 
foil and mylar tape, if 
needed to replace any 
damaged tape.  
						

							LED Cinema Display (27-inch) Take Apart — LCD Panel 67 2010-11-18
Handling LCD 
Panel
1 
Important: Handle 
LCD panel by edges 
only. 
 
Use two hands to carry 
the panel.
 
2 Never touch LCD 
surface or hold LCD 
panel with one hand. It 
could damage the LCD 
panel.  
						

							LED Cinema Display (27-inch) Take Apart — LCD Panel 68 2010-11-18
EDID Reset Tool
After replacing the LCD panel or the logic board in an LED Cinema Display (27-inch), run the EDID 
Reset Tool to reset the Extended Display Identification Data (EDID). If this tool is not used when the 
LCD panel and/or logic board are replaced, software features such as the brightness control may 
not be available.
1.  Download the EDID Reset Tool from Service Source, by navigating the Product Browser to 
“Displays” and then to “LED Cinema Display (27-inch).”
2.  Launch the EDID Reset Tool on a host computer that is connected to the LED Cinema Display 
(27-inch) under test. The following window will appear:
3.   Select the “Reset EDID” button. The Extended Display Identification Data in the logic board will 
be reset and the following message will appear:
4.  Unplug the display’s power cord from AC outlet, wait at least 10 seconds, and then reconnect 
to AC power in order to cycle the unit. The window above should re-appear on the screen.
5.   Verify that System Preferences: Displays has a Brightness slider control present.
6.  The reset process is now complete.  
						

							LED Cinema Display (27-inch) Take Apart — LCD Function Cable 69 2010-11-18
First Steps
Remove:
• Glass Panel
•  LCD Panel
Note: A new LCD panel 
does not include a new 
function cable; it must be 
transferred from old LCD 
panel.
Tools
•  ESD wrist strap
LCD Function Cable  
						

							LED Cinema Display (27-inch) Take Apart — LCD Function Cable 70 2010-11-18
Removal
1 
Note cable routing 
and placement of 
tape securing cable to 
LCD panel.
2 Peel back black 
mylar and foil strips 
covering connector.
3 Squeeze sides of 
connector and pull 
cable straight out 
to remove from LCD 
panel.
Reassembly Note:
Insert cable securely into 
connector and replace all 
mylar and foil tape.