Tip & How-To about Computers & Internet

Laptop service do i need?

Either on the side or back of a laptop will be a grill looking exit (there should be metal thins inside), this is where the fan blows the hot air out of the laptop.
a good tip here is to lick your palm of your hand as when the air blows your be able to feel it more.
also listening the the speed of the fans and comparing it with the amount of airflow you get will determine if you need to service the laptop.
So hear we go...
while turning on the laptop with your hand hoovering over this exit you should feel a rush of air as the laptop starts up
comparing the fan sound with the amount of airflow you get will determine if you need to service the laptop.
if no air flow if felt at all the it is recormended that you service this as soon as possible as there is no cooling working on the laptop and will over time overheat and possibly overheat the graphics chip of the motherboard and then you will need to get it reballed back onto the motherboard.

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Air conditioner works fine while driving. When stopped for a light, temperature gage goes up and fan blows hot air.

Hello: Check the radiator cooling fan. With engine running and A/C on open hood look down on the back-side of the grill, that's where the cooling fan is. It should be running, if not check the fuses, cooling fan relays/module if they are ok then you may have a cooling fan motor failure. You can use jumper cables to hot wire the fan motor to see if it runs.

Sep 14, 2011 | 2002 Saturn Sl

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My wife has a Dell 1545 and it gets hot and shuts off. After a period of time cooling, it still shuts off after a few minuites.

When you operate your laptop make sure your fan at the back is not covered by a cushion if this is not problem fan will need replacing?

Good luck

Aug 22, 2011 | Dell Inspiron 1545 Notebook

1 Answer

toshiba l455d s5976 was working then suddenly shut down

Your description details out a laptop that is overheating.

When a Processor overheats it turns off. (BIOS turns it off)
It's a built-in fail safe feature to keep the Processor from burning up.

The Toshiba Satellite L455D series of Notebook PC's draws air from the bottom of the laptop, and exhausts it out of the side. (Left side)

There is a fan inside a rounded shroud that draws the air in. (Fan Assembly) Draws air in from the bottom of the laptop through a rounded grille opening.

There is a Heatsink at one side of the fan's shroud which catches air from the fan.

[The Heatsink used in this design is essentially a thin plate of metal with tall, thin fins protruding from it.
The plate of metal absorbs heat from the Cooling Tube, and the tall, thin fins absorb heat from the plate of metal.
The tall, thin fins then radiate the heat away.
Air from the Fan Assembly helps to carry heat away from the fins ]

The Heatsink is attached to a slightly flattened copper tube filled with Nitrogen.
The Cooling Tube.

At the other end of the Cooling Tube are two small copper plates.
One plate sits on top of the Processor's case, the other plate sits on top of the GPU.
(Graphics Processing Unit. An Integrated Circuit used for graphics. Also known as the 'Graphics Engine')


The Cooling Tube absorbs heat from the two plates, which in turn have absorbed heat from the Processor, and GPU.

The 'Gunk' described above coats the fan's blades, shroud, Heatsink, and Intake Duct.
(Grille opening on the bottom UP to the Fan is the Intake Duct)

The cooling capacity of the cooling components described above, drops tremendously.
The Fan Assembly cannot produce enough volume of air.
The Heatsink fins are coated, and cannot radiate the heat away as well as they should.

ALL power removed, { AC adapter (Charger), and Battery}, a can of compressed air for computers MAY help.
The plastic straw provided is attached to the can of air's nozzle, and the plastic lock tab on top is broken off.

The laptop is rested on it's side on a table. (You may wish to place a towel down, and perhaps have a helper)
One hand is used to hold the laptop up on it's side, the other hand is used for the can of air.

Air is shot in the rounded grille opening with the straw tip almost touching the grille opening.
Use short bursts. Squeeze the trigger in all the way, then let go quickly.

You Do Not want to spin the fan faster than it was designed for.
This could lead to premature failure of the fan's bearings.

If you tilt the can of air some of the propellant will come out. There is a cautionary on the can.
It is inevitable however, that the can will be tilted.

After you are satisfied you have done the best you can, let the laptop sit for 5 to 10 minutes, before applying power. If there was any propellant that came out, it carried moisture with it.
Waiting as described above, will let any moisture dissipate.

Put the Battery back in, attach the AC adapter, and plug the adapter into power.
Wait 1 minute, then turn the laptop on.

I don't think this will cure the problem. Just a temporary fix.
The laptop needs to be opened up, and the Fan Assembly, Heatsink, and air intake duct, needs to be cleaned with Q-tips, and a couple of cans of air.

(Wear an ESD wrist strap, and have it's alligator clip attached to a Good ground source.
I use an empty desktop computer case, and attach to the metal frame. Average cost of an ESD wrist strap runs around $3 to $5)

Fortunately for the Toshiba Satellite L455D series of Notebook PC, you only have to disassemble the laptop partially. The Fan Assembly is on top of the motherboard in the left corner.
JUST the Fam Assembly can be removed. (One screw)
You can remove it, and clean it, and also have easy access to the Heatsink.

Pictorial disassembly guide,


(There are 3 pages. You are on Page 1. At the top, and bottom of the pages are the page numbers in white.
Page 1::Page 2::Page 3::Find another model )

Toshiba Satellite L450D series of Notebook PC Service Manual (Free)
{The Toshiba Satellite L455D-S5976 Notebook PC, is one of the Satellite L450D series models}


Go to the second Satellite heading that begins with Satellite A10.
Drop down to the second line in this 'paragraph', and left-click right on - L450D

This is a PDF file. It may take up to 30 seconds before you will see the first page, and additional time may be needed to fully download.

Have questions I'm right here. Post in a Comment.
Need step by step guidance, I'm your man.


{Sorry to be so detailed, but I wanted you to know, and see what is going on. JC)

Aug 09, 2011 | Toshiba Satellite L455D-S5976 Notebook

2 Answers

Acer Aspire 5570z laptop CPU Fan

me to !!

it's seem is the fun is broke

Apr 11, 2010 | Acer Aspire 5570-2067 Notebook

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