Toshiba Satellite Pro A300 Disassembly

Geschrieben von: Philip Le Riche

Kommentare: 14

Schwierigkeitsgrad

Moderate

Schritte

Zeitaufwand

Keine Schätzung

Einleitung

There are several variants of the A300 laptop so yours may not be identical in terms of the number and precise position of screws, but the principles will be very much the same. The one used to write this guide is model PSAJ1E.

You will need a small cross-head screwdriver and a prying tool (or a small flat screwdriver or a blunt knife).

In a dry atmosphere or if you find yourself picking up static from the carpet an antistatic wrist strap is highly recommended. At the very least you should frequently touch a radiator or water pipe or an earthed electrical appliance in order to discharge yourself.

Several different lengths of screws are used and it's important to put them back in the right place. You can use an egg box or a pill box and put screws of different lengths in different compartments, or to be really organised, stick the screws from each step to a piece of paper with Blu-tack and write the step number against each.

Werkzeuge

Essential Electronics Toolkit

Schritt 1

Remove the battery. Slide the locking slider to the unlocked position then slide the other spring-loaded slider against the spring while lifting the battery tab.
If you only need to remove the keyboard, you can skip to Step 7.

Schritt 2

Undo 3 captive screws holding the RAM cover in place, and remove the cover.
Remove the RAM stick or sticks by pulling the retaining clips outwards.
On reinstalling the RAM, angle it up and down to ensure it's properly seated in the connector before pushing it down to reengage the clips.

Schritt 3

Optionally, lift the two aerial connectors off the WiFi card, remove 2 screws, and remove the WiFi card.

Schritt 4

Undo 2 captive screws in the hard disk bay cover, and remove the cover.
Remove 2 screws securing the hard disk in its bay. These are the 2 black screws at the opposite end to the connector.
Disengage the hard disk from its connector by pulling on the black plastic tab.
If you are replacing the hard disk you will need to take the old one out of the carrier by removing the silver screws, and insert the new one in the same carrier. Make sure you fit it the same way round as the old one was.

Schritt 5

Undo two captive screws in the 2nd hard disk bay cover and remove the cover.

Schritt 6

Remove the screw which retains the CD/DVD drive, and remove the drive by pushing on the tab that the screw retained.

Schritt 7

Remove three silver screws with large heads from the battery compartment.
Turn the laptop over and open the screen past the vertical position.
Pry out the keyboard bezel. It is retained by 3 clips, one at each end and one in the middle. Disengage the end ones first with a prying tool inserted a short distance in from each end.

Schritt 8

Remove a screw retaining the keyboard.
Lift the keyboard from the back to disengage it from clips on the two sides. Take care not to lift it too far or you may damage its connecting ribbon.
Turn the keyboard over by lifting the back and turning it towards yourself. Lay it flat on its face.
With a fingernail or prying tool, gently lift the black clamping bar on the keyboard ribbon connector and withdraw the ribbon from the connector.
Note that the black clamping bar is easily broken. Repair would be very difficult.

Schritt 9

Close the laptop and lay it upside down.
Remove nine 6.5mm screws as follows:
Three from the front edge.
Four from the 2nd hard disk bay. (One of these is recessed and two others are beneath soft plastic flaps.)
One from the corner of the RAM bay.
One from a corner of the hard disk bay.

Schritt 10

Remove nine 8mm screws as follows:
Six from the back near the corners (either side of the battery bay).
Two from the sides.
One from near the circular vent.
Remove two 3mm screws from the battery bay.

Schritt 11

Turn the laptop over and open the screen.
Disconnect the power button and trackpad ribbons by pulling gently on the tabs.
From the metal plate beneath the keyboard, remove the following screws:
Two 3mm.
Four 6.5mm.
The front of the laptop should now lift off easily. If not, there's yet another screw that you've missed.
On other types of laptop the front and rear shells are often clipped together and the clips still have to be released with a prying tool after removal of all the requisite screws, but not on this.

Schritt 12

With the laptop upside down, disconnect the power connector visible in the RAM bay. Turn the laptop right side up again.
Disengage 3 connectors from the top of the motherboard:
The video connector near the top left.
(The small connector adjacent to the video connector need not be disengaged.)
A small connector at the bottom right corner of the motherboard
The 2nd hard disk bay connector towards the bottom right of the motherboard.

Schritt 13

Disengage two connectors on a small circuit board on the bottom of the 2nd hard disk bay and lift the screened cable off the bay.
Remove two 6.5mm black screws. (On reassembly it's important to put these screws back in the right holes otherwise the front cover of the laptop won't fit.
Gently lift the motherboard from the right hand edge, first disengaging the audio sockets and volume control from the lower shell, then the connectors from their openings in the left hand side. You can now remove it completely.

Schritt 14

Now is an excellent time to clean the fan and the cooling vanes through which it blows air. If necessary you can use a pin to dislodge dust stuck to the heat exchanger vanes, then a vacuum cleaner crevice tool to suck it out.
Hold the fan blades still while you apply the vacuum cleaner as there is a theoretical possibility that if you spin the fan too fast it could generate a high enough voltage to damage the motherboard.
Do not remove the heat sink from the processor and support chips unless you have to. If you do, it's essential that you clean off and replace the heat sink paste in the proper fashion as otherwise the processor is very likely to overheat.
The backup battery is just to the left of the RAM sockets on a pair of flying leads. Remove the modem module (just above it in the photo - retained by a single screw) in order to disconnect it.
Unplugging the backup battery does not reset the BIOS or wipe a BIOS password as it's only used to keep the real time clock running. (There are YouTube videos showing how to reset a BIOS password.)

Can you mention specific youtube video which reset bios password

Shahzad - 16/12/18

Best if you search for them yourself - if I found one for you I couldn’t guarantee that it would work.

Philip Le Riche - 16/12/18

Schritt 15

Before attempting to remove the screen or any other components left in the shell, make a careful note of how each cable is routed. Take detailed photos if your laptop is not identical to this one.
Lift the WiFi antenna leads out of their routing channels.
Whilst supporting the screen, remove six 6.5mm screws from the screen hinge and lift off the screen.
Note that one of the screws on the right hand hinge has an earthing strap under it. On reassembly, take care that this strap isn't caught under the hinge and is secured by the screw when replaced.
To remove and replace the power connector and lead, remove the right hand speaker, secured by two screws at the base of its sound box.

Schritt 16

Remove six screw covers (if present) from the screen bezel, and remove the 6 screws.
Use a spudger to release the retaining clips around the edges of the bezel and the bottom of the hinge cover, and lift off the bezel.
You now have access to the LCD, the inverter at the bottom of the screen (this powers the backlight) and the WiFi antennae along tne top.
A few more screws allow you to remove the LCD panel from the screen shell, which you will need to do if you have a bare replacement LCD. Without the protection of the screen shell the LCD panel is delicate and should be handled with care.

Abschluss

To reassemble your device, follow these instructions in reverse order.

Tinte & Feder

Philip Le Riche

Mitglied seit: 18/02/14

28306 Reputation

12 Kommentare

Hello! Please, where is the battery for BIOS this model? Thank you in advance!

Nicky TUDOR - 19/11/17

Hi Nicky - See Step 14, and the final 2 bullets following the warnings.

Philip Le Riche - 20/11/17

Hello Philip

I read your article with big interest because I am having trouble with one similar the one you were showing.

My daughter has forgotten her password and now she cant get access to the laptop.

It´s not a big problem for her as she already has bought herself a new one but I intended to use it for myself even it´s from 2009, as I dont use a computer a lot.

My problem is how do I open the computer? When I try to insert a password it tells me I am wrong and I can do this three times and then the computer goes black.

Toshiba want´s me to send it to the manufacturer and bye bye a lot of money before they even have started to fix it.

Can you help me?

In advance Thanks!

Bent Thygesen - 29/09/18

In the first photo in Step 4 you can see a label with a burn mark. This is partially covering a pair of triangular solder pads. (On slightly different models they may or may not be beneath the RAM modules when inserted, and may or may not be hidden by a label.) In a nutshell, you need to short them together while pressing the power button. The laptop will only come on after releasing the short while still holding the power button.

But in practice it may be a bit harder - I did one just recently and it took a while to get the procedure right. You can short out the pads with a flat bladed screwdriver but it’s not easy and you’ll almost certainly need an extra pair of hands. You will save yourself a lot of trouble if you can solder a switch or push button on flying leads to the solder pads, to enable you to short them with the laptop open on the table.

Philip Le Riche - 29/09/18

If it doesn’t work at first, try counting up to 10 (or even 20) at different stages between shorting the pads, pressing power, releasing the short and releasing the power button. Try (if you can) with one or both RAM modules inserted.

I was fairly sure the one I did recently had previously been unlocked. When you get into the BIOS, first set the password to something known, make sure you can boot (not just once), go back into the BIOS to clear the password, and then check you can boot a couple more times. It might even be necessary to boot into Window the first time you get past the BIOS password. Keep at it - you’ll get there eventually!

Philip Le Riche - 29/09/18

Sorry Philip I hadn´t seen it before you wrote to me.

I will try to see if it works in the weekend and of course let you know what the result may be.

In advance thanks

Bent Thygesen

Bent Thygesen - 04/10/18

Thank you for this guide, with your steps I managed to fix a Toshiba Satellite A300 that had a broken display cable, now it’s working again! Cheers!

Stătescu Ioanide Teodor - 02/04/19

So glad it helped you!

Philip Le Riche - 02/04/19

Hi Philip,

Where is the board identifier (part number) of the motherboard of A300 (PSAJ1C-016014). Could I see it on some of yours attached pictures?

Can I find it without disassembling the laptop?

Thank you.

Hin - 02/10/19

bios password

not open windows

Sajjan Khan - 11/12/19

I found my old laptop last week and I opened it to clean in but when I was putting the pieces back I put something wrong and now my mousepad and keyboard doesn't work at all. The weird thing it's that the led from the mousepad it's working. I know the laptop it's old but I want to see what's inside.

algeorgos70 - 07/03/21

Most likely you haven’t reinsterted the ribbons under the keyboard correctly or you haven’t closed the locking bar. It can be a little tricky to insert the ribbons into the narrow slot they go in. Having closed the locking bar you should be able to pull gently on the ribbon without it coming out.

Philip Le Riche - 07/03/21