Toshiba Satellite L755 Installation instructions

How to disassemble Toshiba Satellite
L755, L755D, L750, L750D laptops
Today I'll show how to dismantle a Toshiba Satellite L755 laptop. I'll be taking
apart the laptop case and removing major internal components.
All dismantling steps should be the same for the following (identical) Toshiba
models:
- Toshiba Satellite L755D.
- Toshiba Satellite L750.
- Toshiba Satellite L750D.
Here are main laptop disassembly steps:
STEP 1- 5: Removing laptop hard drive and DVD drive. Accessing
memory modules, CMOS battery, wireless card.
STEP 6- 13: Disconnecting and removing laptop keyboard.
STEP 14-20: Removing top cover assembly.
STEP 21-27: Disconnecting and removing laptop motherboard.
STEP 28-29: Accessing the cooling fan and DC jack harness.
Step 30-44: Replace the laptop screen
STEP 1
Make sure the laptop is turned off before you
start dismantling it.
Unplug AC adapter. Unlock and remove laptop
battery.
STEP 2
Unscrew five screws securing the hard drive
cover and memory cover.
Lift up covers and remove them from the laptop.
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STEP 3
When both covers removed you can access the
laptop hard drive, CMOS battery, wireless card
and both memory modules.
It's not necessary to remove the wireless card
and memory modules for the purpose of my
guide. I'll leave them connected to the laptop.
Remove one screw securing the hard drive
mounting bracket to the laptop case.
STEP 4
Slide the hard drive assembly to the left to
disconnect it from the motherboard.
Lift up and remove the hard drive assembly.
Toshiba Satellite L755, L755D, L750, L750D
laptops have a regular 2.5" SATA hard drive
installed. If you are replacing the hard drive,
you'll have to transfer the mounting bracket to
the new drive.
STEP 5
Remove one screw securing the DVD optical
drive.
Pull the drive to the left to disconnect it from the
motherboard.
Remove DVD drive.
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STEP 6
Remove one screw located in the battery
compartment.
This screw securing the keyboard bezel.
STEP 7
Turn the laptop over and carefully lift up the
keyboard bezel with a small screwdriver.
Continue removing the bezel with your fingers.
You'll have to wiggle it a little bit in order to
separate from the laptop.
STEP 8
Remove four screws securing the keyboard.
STEP 9
After all four screws removed you should be
able to lift up the top side of the keyboard and
turn it upside down.
Place the keyboard on the palmrest. Be careful,
the keyboard still connected to the motherboard.
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STEP 10
It's necessary to unlock the connector and
release the cable before removing the keyboard.
In the following two steps I explain how to unlock
the connector.
STEP 11
The connector has two pieces:
1. The white base which is soldered to the
motherboard.
2. The brown locking tab - the moving part.
Carefully lift up the left side of the locking tab so
it opens up at a 90 degree angle.
STEP 12
Now you can pull cable from the connector.
STEP 13
Remove the keyboard.
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STEP 14
Remove shown screws from the bottom of the
laptop.
STEP 15
Don't forget two more screws in the DVD drive
bay.
STEP 16
Remove screws securing the top cover
assembly.
Disconnect the touchpad cable (1). Use same
technique as for disconnecting the touchpad
cable.
Disconnect the speaker cable (2).
STEP 17
The speaker cable has a regular male-female
type connector.
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STEP 18
Start separating the top cover assembly from
the laptop base using a piece of plastic (I'm
using the guitar pick).
Continue separating the top cover from the base
with your fingers.
STEP 19
Remove the top cover assembly.
STEP 20
On the bottom part of the top cover you can
access both speakers, touchpad and touchpad
button board.
STEP 21
After the top cover assembly removed you can
access the folloing internal laptop components:
- Power button board.
- DC jack.
- USB board.
- Motherboard.
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STEP 22
Remove three screws securing the motherboard
and cooling fan assembly.
Disconnect the USB board cable (1) and power
button board cable (2). Use same technique as
for disconnecting the keyboard cable.
STEP 23
Carefully unglue the protective film from the
laptop case.
STEP 24
In order to remove the motherboard it's
necessary to disconect the DC jack cable and
both wireless card antennas.
They are located under the memory cover which
we removed in the step 2.
STEP 25
Start removing the motherboard as it shown on
the picture.
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STEP 26
Remove motherboard from the laptop base.
STEP 27
On the bottom side of the motherboard you can
access the cooling fan assembly and CMOS
battery (on the left side from the wireless card).
STEP 28
In order to remove the cooling fan assembly (fan
and heatsink) you'll have to loosen four screws
and disconnect the fan cable.
After that carefully lift up the assembly and
separate it from the processor.
STEP 29
The DC jack is attached to the harness.
If the DC jack failed, you can remove the whole
harness and replace it with a new DC jack
harness.
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STEP 30
There are four screw covers on the screen
bezel. One cover in each bezel corner.
STEP 31
Remove all four covers with a sharp object.
Glue covers (they have sticky tape on the
bottom) somewhere on the bezel so they don't
get lost during the disassembly process.
STEP 32
Start separating the screen bezel from the
display back cover.
Here's how I do it:
- insert your fingers between the bezel and LCD
screen on the top of the display assembly.
- insert the guitar pick (you can use any other
piece os plastic) between the bezel and back
cover and slowly move it along the side.
- at the same time wiggle the bezel to unlock
hidden latches inside the display.
STEP 33
Continue separating the screen bezel from the
display assembly.
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STEP 34
It was kind of difficult to separate the bezel from
the display on the bottom.
Close the display and using the same guitar pick
separate the screen bezel from the display on
the bottom.
The picture shows the battery compartment area
of the laptop.
STEP 35
Now start separating the bezel from the display
hinges.
Insert a small flathead screwdriver under the
hinge cover (part of the screen bezel) and
carefully lift it up.
Do the same with the hinge cover on the left side
of the display.
STEP 36
Remove the screen bezel.
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STEP 37
Disconnect the cable from the right side of the
web camera module.
NOTE: the web camera is not part of the display.
It's a separate module.
STEP 38
Separate the LCD screen from the display back
cover just enough to access screws on the side.
Remove two screws securing the LCD screen to
the right hinge bracket.
STEP 39
Remove two more screws securing the LCD
screen to the left hinge bracket.
STEP 40
Now you can separate the LCD screen form the
display back cover and place it face down on the
palmrest.
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STEP 41
The video cable glued to the back of the screen
with sticky tape.
As you see, the web camera cable is part of the
video cable harness.
I circled the video cable connector.
STEP 42
Unglue sticky tape securing the connection and
unplug the video cable connector from the LCD
screen.
STEP 43
Remove the LCD screen. It's ready for the
replacement.
STEP 44
Also you can search for a new replacement
screen using the model number from the original
screen.
The model number printed on the back side of
the screen.In my Toshiba Satellite L755 laptop I
had the following screen installed:
LTN156AT05-U09
There could be more than one screen
compatible with this laptop.
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