Apple imac usb 2 0 User Manual

							
92 - iMac (USB 2.0)  Take Apart
 Display, 20" Flat Panel
10. Separate the flat panel display from the front bezel  
						

							
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 Display, 20" Flat Panel
Replacing the EMI Panel Gaskets
The following instructions explain how to replace the EMI gaskets on the iMac (USB 2.0) 
20-inch panel.  Note: If the gasket kit (076-1059) does not come with the replacement 
panel, remove the gaskets from the defective panel and place them on the new panel.
Tools
• No tools are required unless you are reusing the gaskets. A nylon probe \
tool would be  required to peel the gaskets off the original panel.
Procedure
1. The iMac (USB 2.0) 20-inch panel (shown below) has EMI gaskets attached to the  top, the back and to both sides of the panel.  Important: Gaskets need to be installed 
on the replacement panel. 
2. Attach the five small EMI gaskets (circled) across the top of the replacement panel.  The black mylar tape shown below is attached last, and is discussed in step 5.    
						

							
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 Display, 20" Flat Panel
3.  Attach the EMI gasket to the bottom of the display panel (as shown). Repeat for the 
top of the display panel. 
4. Attach the three gaskets to the side of the panel. Repeat for the other side.
5. Screw the panel to the rear display housing. Connect the panel cables (not shown).  Place the black mylar tape over the TMDS cable (not shown) to hold it securely in 
place.
6. Reassemble the rest of the panel. Test the unit before returning it to the customer. 
						

							
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 Display, 17" Flat Panel
Display, 17 Flat Panel
Tools
This procedure requires the following tools:
• 1.5 mm hex tool
• Torx-10 screwdriver
Important:   If you are replacing the 17-inch display panel, be sure to install the display 
shield and EMI gaskets that come with the new LCD panel. Installation instructions are 
included with the new display panel.
Part Location
Preliminary Steps
Before you begin, do the following:
• Position the computer in the service stand. 
						

							
96 - iMac (USB 2.0)  Take Apart
 Display, 17" Flat Panel
Procedure
1. Remove three screws that connect the back cover to the flat panel LCD display. Use 
the 1.5 mm hex tool to remove these screws. 
2. Support the back cover and push on the display bezel (as shown) to separate the  display bezel from the display’s back panel. 
						

							
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 Display, 17" Flat Panel 3.  Carefully raise the top side of the display and disconnect the inverter cable (A) and 
remove the tape holding down the TMDS cable (B).    
4. Raise the display a bit more to access the TMDS display connector located behind the  black tape. Peel back the black tape. 
						

							
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 Display, 17" Flat Panel
5. Disconnect the TMDS display connector by squeezing the clip (1) on each side of the 
connector. Gently pull the cable (2) out of the slot.
6. Raise the panel all the way up. Disconnect the power on LED cable (A) and the  microphone cable (B). Set the rear housing/shield aside. 
						

							
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 Display, 17" Flat Panel 7. Remove four screws that connect the LCD display panel to the display bezel. Also, 
remove the kapton tape to release the inverter cables on the left side, and the LED 
and microphone cables from the bottom edge of the LCD display. 
8. Lift the display panel out of the display bezel. 
9. Remove the inverter from the display if you are returning the flat panel display to  Apple. Refer to the “Inverter, 17" Display” take apart procedure in this chapter for 
instructions.
Replacement Note:  If you are replacing the display, be sure to install the display 
shield and EMI gaskets (076-0958) that come with the new LCD panel. Installation 
instructions are included with the new display panel.  
						

							
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 Display, 17" Flat Panel
Replacing the 17Display Panel
1. After connecting the display cables, position the display into the rear housing. Place 
the display into the rear housing, sliding it into position, pushing it in the dir\
ection of 
the arrows.  Note: The display mates with tabs/slots in the rear housing. If the display 
doesn’t fit properly and you can’t install the three screws along the bottom of the 
housing, check that the display is properly seated in the rear housing.   
2. Holding onto the display, turn it over and lay the display face down on a soft cloth.  Push the rear housing in the direction of the arrows. This will mate the housing and 
display tabs. 
						

							
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 Display, 17" Flat Panel 3. Check the alignment of the rear housing and the flat panel display. If the display 
doesn’t slide into the tabs/slots on the rear housing, a white line s\
hows across the 
back of the rear housing (see below).
4. A properly installed display will have no white line showing across the back of the rear  housing (see below), and the three display-to-housing screw holes align perfectly.