Dell Inspiron 3500 Service Manual

							Removing and Replacing Parts 4-15
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system board rails (2) with 
5-mm screws (2) and 
16 -mm  sc rew  
heat-sink fin cover 
with 3.5-mm 
screw 
processor 
module 
assembly 
with 14-mm 
screws (2)
heat-sink fin
fan and fan cover with 
5-mm screw 
system board 
(in EMI pan) system-board 
retaining clip with 
14-mm screw infrared board 
with 5-mm 
screw 
optional 
internal modem 
with 14-mm 
screw (1)
LVDS board
video board 
with 4-mm 
jack screws (2) 
and 14-mm 
screw 
PC Card cage 
with 14-mm 
screws (4)
DC/DC board 
with 14-mm 
screw
audio jack 
board
audio jack 
shield
system-board 
retaining clip 
(with 5-mm 
screw)
bottom plastic speakers (2)
release 
latches (2)
ground 
springs (2)
monitor 
connector cover 
						

							4-16Dell Inspiron 3500 Portable Computer Service Manual
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To remove the display assembly, see Figures 4-12, 4-16, and 4-17 and follow 
these steps:
1. Close the computer and place it upside down.
2. Remove the four 16-mm display screws from the bottom of the computer 
(see Figure 4-17). The display screws have a “D” tooled into the base plas-
tic beside them. Once the screws are removed, the display assembly is 
very loose (see the figure above).
3. Hold the computer firmly and turn it back over.
4. Remove the top half of the cover over the monitor connector. This connec-
tor is on the back of the computer.
5. Remove the 5-mm screw that was beneath the cover.
6. Unlatch the LCD latch.
7. Slowly open the display assembly so it is at a 90-degree angle to the base. 
This action repositions the hinges so you can remove the bezel later.
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FLH 2.5 x 19 (4) 1.5–2.0 kgf-cm
FPH 2.5 x 5 (1) 2.0–2.5 kgf-cm
FPH 2 x 2.5 (2) 1.5–1.8 kgf-cm
19-mm screws (4)5-mm 
screw (1) 
						

							Removing and Replacing Parts 4-17
8. Gently lift the display assembly so the hinges are free of the base.
Do not lift the assembly too far up because the LCD FPC cable is still con-
nected to the LVDS board. The FPC bobbin and hinge covers will lift with 
the assembly; the connector cover may lift with the assembly.
9. Place the display assembly on a support so that the LCD FPC cable is not 
stressed.
10. Remove the connector cover to expose the end of the LCD FPC cable that 
connects to the system board.
11. Remove the two 2.5-mm screws securing the LCD FPC cable connector to 
the LVDS board and gently lift the connector off of connector C24 on the 
LVDS board.
The display assembly is now free from the base. The hinge covers may 
remain in place.
12. Remove the ground springs from the holes in the system board rails in the 
base of the computer. These fall out easily when the computer is turned 
upside down. 
						

							4-18Dell Inspiron 3500 Portable Computer Service Manual
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To remove the bezel and LCD latch, see Figure 4-13 or 4-14 and follow these 
steps:
1. Remove the display assembly.
2. Use the dental pick to remove the four screw covers from the bottom of 
the bezel. Take care not to cause cosmetic damage and not to put pressure 
on the LCD panel.
3. Remove the two rubber bumpers from the top of the bezel. Take care not 
to cause cosmetic damage and not to put pressure on the LCD panel.
4. Remove the six 5-mm screws securing the bezel to the display assembly.
5. Remove the bezel. Free the snaps at the bottom of the bezel by applying 
light pressure on the inside bottom edge of the bezel and pulling the bezel 
slightly up and towards you. Hold the LCD latch out of the way when 
removing the top of the bezel.
6. Insert a small flat blade at the top of the latch and pry the latch up from the 
retainer in the back cover. You may be able to rotate the LCD latch inward 
to release it from the retainer in the back cover.
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FPH 2.5 x 5 (6) 3.5–4.0 kgf-cm 
						

							Removing and Replacing Parts 4-19
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To remove the inverter, see Figure 4-13 and follow these steps:
1. Remove the display assembly.
2. Remove the bezel.
3. Disconnect the inverter signal cable from the side-lift ZIF connector CN1 on 
the left side of the inverter by gently pulling each side of the ZIF connector, 
and then pulling out the cable.
4. Disconnect the LED cable from connector CN3 on the inverter.
5. Disconnect the LCD cable from connector CN2 on the inverter. (A red dot 
denotes the top of the LCD cable connector when you are installing the 
cable.)
6. Remove the inverter. 
						

							4-20Dell Inspiron 3500 Portable Computer Service Manual
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To remove the inverter, see Figure 4-14 and follow these steps:
1. Remove the display assembly.
2. Remove the bezel.
3. Disconnect the inverter signal cable from the side-lift ZIF connector CN1 on 
the left side of the inverter by gently pulling each side of the ZIF connector, 
and then pulling out the cable.
4. Disconnect the wraparound LCD FPC cable on the left side of the inverter. 
The cable wraps around the inverter and connects to itself.
5. Remove (and save for installation) any Kapton-tape securing cables on the 
right side of the inverter.
6. Lift the inverter partially up to make disconnecting the remaining cables 
easier.
7. Disconnect the LED cable from connector CN3 on the right side of the 
inverter.
8. Disconnect the LCD cable from connector CN2 on the right side of the 
inverter. 
9. Remove the inverter. 
						

							Removing and Replacing Parts 4-21
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To remove the LCD interior assembly from the back cover, see Figure 4-13 or 
4-14 and follow these steps:
1. Remove the display assembly.
2. Remove the bezel.
3. Remove the left and right hinge covers.
NOTE: For installation, remember that the foot of the left hinge cover faces 
the keyboard and that the infrared lens in the right hinge cover faces out-
ward to receive infrared transmissions.
4. Remove the two 5-mm screws securing the left and right hinges, and then 
remove the hinges. The hinges are not interchangeable, but are color-
coded; the nut on the right hinge is gold and, on the left, silver.
NOTE: Note how the screws go through the panel rails into the hinge so 
you will install the screws in the right place during installation.
5. Remove the top half of the FPC bobbin by inserting a flat blade into the 
bobbin and carefully prying the top and bottom apart.
6. If you have not removed the inverter, lift it up slightly (it is still connected to 
the LCD). 
7. Slide the entire LCD interior assembly (which includes the LCD panel, 
panel rails, EMI pan, and LED card and cable) down to free the panel rails 
from the retaining tabs in the back cover. 
8. Slide the LED card out of the plastic retainer next to the LCD latch.
9. Remove (and save for installation) any Kapton tape securing the LED or 
LCD cable to the back cover.
10. Remove the entire LCD interior assembly from the back cover. 
When installing the LCD interior assembly, place it flat into the back cover, as 
close to the hinge edge as possible. Then slide it upward to fit it underneath 
the plastic retaining tabs.
7\SH RI 6FUHZ 7RUTXH
FPH 2.5 x 5 (2) 3.5–4.0 kgf-cm 
						

							4-22Dell Inspiron 3500 Portable Computer Service Manual
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To remove the panel rails, see Figure 4-13 and follow these steps:
1. Remove the display assembly.
2. Remove the bezel.
3. Remove the LCD interior assembly.
4. Remove the LED cable from the right panel rail (optional).
NOTE: Note the routing of the LED cable through the right panel rail for 
installation.
5. Place the LCD interior assembly face down on a surface that will not dam-
age the LCD.
6. Remove the two 5-mm screws securing the left panel rail.
7. Remove the left panel rail. It is stamped with an L (left) for easy 
identification.
8. Remove the two 5-mm screws securing the right panel rail. Note that 
these screws can be loosened so the panel rail can slide out of the slots; 
the screws do not have to be completely removed
9. Remove the right panel rail. It is stamped with an R (right) for easy 
identification.
During installation, the rails must fit snugly against the LCD panel so the inte-
rior assembly will fit inside the back cover.
7\SH RI 6FUHZ 7RUTXH
FLH 2.5 x 5 (4) 1.5–1.8 kgf-cm 
						

							Removing and Replacing Parts 4-23
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To remove the panel rails, see Figure 4-14 and follow these steps:
1. Remove the display assembly.
2. Remove the bezel.
3. Remove the LCD interior assembly.
4. Remove the LED cable from the right panel rail (optional).
NOTE: Note the routing of the LED cable through the right panel rail for 
installation.
5. Remove the two 4-mm screws securing the left panel rail to the side of the 
LCD panel.
6. Remove the left panel rail. It is stamped with an L (left) for easy 
identification.
7. Remove the two 4-mm screws securing the right panel rail to the side of 
the LCD panel.
8. Remove the right panel rail. It is stamped with an R (right) for easy 
identification.
During installation, the rails must fit snugly against the LCD panel so the inte-
rior assembly will fit inside the back cover.
7\SH RI 6FUHZ 7RUTXH
FLH 2 x 4 (4) 1.5–1.8 kgf-cm 
						

							4-24Dell Inspiron 3500 Portable Computer Service Manual
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To remove the LCD panel from the EMI pan, see Figure 4-13 and follow these 
steps:
1. Remove the display assembly.
2. Remove the bezel.
3. Remove the LCD interior assembly.
4. Remove the panel rails.
5. Turn the LCD interior assembly face up.
6. If present, remove (and save for installation) any Kapton tape from the 
lower right corner of the LCD interior assembly.
7. If present, remove (and save for installation) any Kapton tape from the cen-
ter left side of the LCD interior assembly.
8. Remove (and save for installation) the EMI tape from the side and the bot-
tom of the LCD interior assembly.
NOTE: When removing the EMI tape, hold each end of the tape at all 
times. If one end is released, the tape will curl and stick to itself.
9. Remove (and save for installation) any other Kapton or EMI tape securing 
the LCD cable to the EMI pan.
10. Lift the LCD panel partially out of the EMI pan. The LCD FPC cable is still 
attached to the LCD panel.
11. Remove (and save for installation) the Kapton tape securing the LCD FPC 
cable to the LCD panel.
12. Gently pull the LCD FPC cable out of the connector on the LCD panel.
13. Lift the LCD panel out of the EMI pan. The LCD FPC cable remains taped 
to the EMI pan.