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Toshiba Satellite A105 Laptop Dust Removal Guide
A guide to disassembling an overheating Toshiba Satellite A105 laptop & removing dust from the processor heat sink.

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I am not a computer technician. Proceed at your own risk. I am not responsible for any damages, injuries or mishaps.

This guide was specifically written to assist owners of the Toshiba Satellite A105 series of laptops in disassembling the computer to access and clean dust away from the heat sink to prevent the processor from overheating or becoming damaged. Owners of other Toshiba laptops including the A205, A305, M115, A135, A215, A300, A355, L300, L305, L355, M105, M205, M300, M305, P105, P205, P305, S300, or U400 series may find this guide to be useful due to a similar body style.
Toshiba A105-S4254
Satellite Laptop Underside
Antec Laptop Cooler

I've been using this Toshiba Satellite A105-S4254 laptop just about every day, all day, for the past three years.

Recently I noticed that the laptop's main cooling fan was ramping up to it's highest (and loudest) speed during processor intensive activities such as encoding videos for this site.

I thought that this could be an early sign of a dust clogged heat sink, which would eventually lead to processor overheating.

The laptop never seems to overheat while it's on top of the Antec Laptop Cooler, but I didn't want to risk it overheating when I travel without the cooling pad. So I decided to completely take it apart to clean out all the dust.

First, I laid down an old t-shirt to protect the laptop lid from scratching and removed the Li-Ion battery.

Battery # PA3399U-2BRS
Unscrewing HD Cover
80GB SATA Hard Drive
The next step is to remove the hard drive cover (just one screw), slide the hard drive to the left to disconnect it, and lift it out of the laptop case. (If you live in a static prone environment, be sure to wear an anti-static wristband.)
Slide HD To Left
Hard Drive Removed
Unscrew Ram Cover
Then unscrew the RAM memory cover (just one screw again) and pop it off using a flathead screwdriver or tweezers.
Popping Off Ram Cover
2 512MB RAM Sticks
Popping Out RAM
Remove the two sticks of RAM by moving the side rails away from the RAM modules. Put them aside somewhere safe away from liquids or static electricity prone surfaces.
Toshiba-A105-Laptop-Disassembly-Guide-013 Toshiba-A105-Laptop-Disassembly-Guide-014 Toshiba-A105-Laptop-Disassembly-Guide-015
RAM Removed
Unscrewing DVD Drive
Manual Eject DVD Tray
DVD Drive Removed

Next remove the one small screw that holds the DVD-RW/CD-RW multi drive in place. I had trouble getting the drive to slide out, so I used a paper clip to manually eject the DVD/CD tray and pulled the drive out of the laptop body.

17 Laptop Underside Screws
Top of Laptop Body
Popping Up Keyboard Strip
The first picture in the row above is of the 17 screws that I removed from the bottom of the laptop. Fifteen of the screws are the same size and two are slightly smaller. Double check to make sure that you got all of the screws out before you continue. There's nothing worse than trying to open up the case of a delicate electronic device without realizing that one screw is still holding it together.
Two Tabs, Each Side
Screen Folded Back
The hardest part about disassembling this Toshiba Satellite A105 laptop is popping off the very stubborn keyboard strip. Don't rush and be gentle or you will break the strip or cause damage to your computer's speakers. Start by inserting a small flat headed screwdriver in between the keyboard strip and the laptop.
Popping Tabs Along Strip
Keyboard Strip Removed
Removing Keyboard Screws
On each side of the keyboard strip, there are two small hooks located in the middle of the strip in line with the speaker openings. They are about half an inch back from the side of the laptop. Once you get the strip popped up on both sides, fold the laptop's LCD screen back all the way. Then lift up the keyboard strip from the rear of the laptop towards yourself.
Left Keyboard Screw Out
Two Keyboard Screws
Keyboard Connector Removed
Under the keyboard strip, you'll find the two small screws that secure the keyboard to the laptop. Take them off and then carefully lift the keyboard until you can access the keyboard connecting cable. This type of connector has a lock that must be raised on each side before the cable can be removed. I used a pair of tweezers to pry up the locking mechanism. If you use a screwdriver instead, be very careful to not scratch or gouge the motherboard.


Keyboard Connector Unlocked
Rear Screen Hinge Screw
2nd Screen Hinge Screw
Once the keyboard is out of the way, unscrew the two screws on the rear of the LCD screen's hinge.
Two Rear Screen Hinge Screws
Keyboard Removed
LCD Screen Screws, Left
2 Screen Screws, Right
Removing LCD Screws
Pop Out WiFi Card

Then unscrew the four screws on the front side of the laptop that hold the screen to the lower half of the computer.

Wireless Card Antenna Wires
WiFi Antenna Wires Out
LCD Video Connector
Before you can completely remove the LCD screen, we have to pop out the WiFi card along with its antenna wires and the video connector cable.
Prying Up LCD Connector
LCD Video Connector
LCD Screen Socket
After the 2 rear hinge screws, 4 top hinge screws, video connector, and wireless card with antenna wires are removed, the screen can be removed.
LCD Screen Disconnected
Disconnect Cables
DVD Control Cable
Next we need to disconnect the two audio connectors that go to the headphone and microphone jacks. They can just be lifted out with tweezers or you can pry them out with a flat head screwdriver. 
Speaker & Audio Cables
Touchpad Control Cables
Unlocking DVD Connector
Then unlock and remove the DVD drive control cable and the two touchpad control cables.
DVD Cable Disconnected
Touchpad Cable Disconnected
Cables Disconnected
Verify that all of the cables have been disconnected before proceeding. I forgot to disconnect the audio connectors and had to stop my attempt to separate the top and bottom halves of the case.
3 Tabs, Battery Compartment
Case Tab 1
Case Tab 2
Next located the three tabs inside of the battery compartment and pop them in using a flathead screwdriver.
Case Tab 3
Screwdriver, Popping Tabs
Disconnect Audio Connectors
Now slide a thin piece of plastic along the side of the laptop to release the tabs holding the left and right sides of the upper part of the laptop case to the lower half. Just be gentle and take your time. It took me a few tries to get it apart.
Case Top Removed
A105 Motherboard
Case Top & Motherboard
With the top of the case finally removed, I could see the dusty motherboard inside my three year old Toshiba Satellite A105 laptop.
Toshiba CMOS Battery
Main Laptop Cooling Fan
Intel Processor Heat Sink
At first glance, the motherboard didn't seem to be all that dusty. I decided to dig a bit deeper into the motherboard by removing the cooling fan housing.
mPGA478MT Socket
Copper Heat Transfer Bar
Copper Heatsink & Fins
Fan Housing Removed
Thick Sheet of Lint & Dust
Heat Sink Fins Clogged
As you can see from the pictures above, the real culprit behind my laptop's poor cooling performance was a thick, clothes dryer lint screen style, sheet of dust covering the entire length of the copper heat sink.
Toshiba-A105-Laptop-Disassembly-Guide-073 Toshiba-A105-Laptop-Disassembly-Guide-074
Peeling Off Dust Layer
Ball of Dust & Lint
I peeled off the dust sheet with tweezers and then blew the rest of it away with a "Hurricane" brand dust blower bulb. To reassemble my Toshiba A105, I reversed the steps above. At first, the laptop wouldn't boot up. If this happens to you, don't panic. Many times you just need to reseat the RAM chips. After I reseated the RAM modules, the computer booted up and ran perfectly with a breeze of cool air flowing freely out of the side. It took a lot of work to complete this procedure but it was worth the effort to keep my laptop performing well and extend it's useful life for a few more years.
Laptop Case Screws Labeled
Camera Dust Blower
Cleaned Heatsink Fins
For more of my related photo galleries, check out the following links: Desktop Computer Ram Upgrade Guide, TiVo Hard Drive Upgrade Guide, HP iPAQ PDA GPS Navigation System, Toshiba Satellite M115 Laptop Review, Toshiba Satellite A105 Laptop Review, Canon S5 IS Digital Camera Review, HP iPAQ HX4700 Backup Battery Replacement Guide, Microsoft Natural Keyboard 4000 Sticky Spacebar Repair Guide, and the SanDisk Sansa Fuze 4GB MP3 Player Review.
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