How to disassemble Packard Bell LJ 75 laptop and clean cooling system

In one frozen day of february 2010 I bought brand new laptop. It was Packard Bell LJ75 modification LJ75-JN-101RU based on, new for that time, Intel Core i3 processor and ATI Mobility Radeon HD 5400 GPU. The first think that struck me in new laptop — it’s almost not heated, in comparison with my old Samsung R40. Packard Bell stay cold even on two hour of HD filming on sofa. It was really cool! But as time passed, I began to notice that temperature of my laptop is growing. It’s time to disassembly and clean my laptop.

How to disassembly Packard Bell LJ 75 and clean cooling system


For disassembly we need philips screwdriver PH.1 and PH.000 sizes. Also we need flathead screwdriver 2 or 3 size. Better to use magnetic screwdrivers. All screws in this laptop for philips screwdriver. Most of them are unscrewed by PH.1 size screwdriver. PH.000 is only for 3 fan screws. Flathead screwdriver is only for opening latches.

There are few different types of screws used in this laptop. They can be divided by two groups — with big cap and with small cap. Small cap screws used in bottom of laptop and holds lcd screen. Big cap screws used in other places. There are two lengths of big cap screws — 5 mm and 3 mm. 3 mm big cap screws is only 3 — 2 of them in hdd 1 bay, and one under the keyboard.

This is not a official guide. All responsibility is on you. Remember: after disassembling the device, you lose your warranty!

Let the disassembling begin.

Turn laptop on the cover.

How to disassembly Packard Bell LJ 75 and clean cooling system

Remove battery, and unscrew marked screws, that holds hdd-bay and memory-bay covers.

How to disassembly Packard Bell LJ 75 and clean cooling system

Remove covers.

How to disassembly Packard Bell LJ 75 and clean cooling system

Remove HDDs and after that unscrew marked screws, that holds bottom part of laptop.

How to disassembly Packard Bell LJ 75 and clean cooling system

Remove DDR modules.

How to disassembly Packard Bell LJ 75 and clean cooling system

Unscrew 1 screw that holds DVD-ROM.

How to disassembly Packard Bell LJ 75 and clean cooling system

Remove DVD-ROM. You may need press little bit by screwdriver.

How to disassembly Packard Bell LJ 75 and clean cooling system

Done.

How to disassembly Packard Bell LJ 75 and clean cooling system

Release antennas from WiFi card, and unscrew 1 screw.

How to disassembly Packard Bell LJ 75 and clean cooling system

Done.

How to disassembly Packard Bell LJ 75 and clean cooling system

It’s all done under. Turn the laptop.

How to disassembly Packard Bell LJ 75 and clean cooling system

Carefully hook in this place using flathead screwdriver.

How to disassembly Packard Bell LJ 75 and clean cooling system

Open latches from rear side.

How to disassembly Packard Bell LJ 75 and clean cooling system

Carefully pull this part up, but not so strong. There is a flatcable connected to this part in the middle.

How to disassembly Packard Bell LJ 75 and clean cooling system

Part is released.

How to disassembly Packard Bell LJ 75 and clean cooling system

Release flatcable connector, and remove the part.

How to disassembly Packard Bell LJ 75 and clean cooling system

Hook keyboard little bit, and release keyboard from right top latch. Left top latch is released easily.

How to disassembly Packard Bell LJ 75 and clean cooling system

When you free the keyboard, slide it on touchpad.

How to disassembly Packard Bell LJ 75 and clean cooling system

We need release keyboard flatccable. Black part of the connector is locker. Release right side of the locker.

How to disassembly Packard Bell LJ 75 and clean cooling system

Then release the left side.

How to disassembly Packard Bell LJ 75 and clean cooling system

After that pull up locker and release flatcable.

How to disassembly Packard Bell LJ 75 and clean cooling system

Done. Keyboard is removed.

How to disassembly Packard Bell LJ 75 and clean cooling system

Disconnect power button connector.

How to disassembly Packard Bell LJ 75 and clean cooling system

Disconnected.

How to disassembly Packard Bell LJ 75 and clean cooling system

Pull out all antennas.

How to disassembly Packard Bell LJ 75 and clean cooling system

All antennas here.

How to disassembly Packard Bell LJ 75 and clean cooling system

Disconnect video connector.

How to disassembly Packard Bell LJ 75 and clean cooling system

Disconnect web-camera connector.

How to disassembly Packard Bell LJ 75 and clean cooling system

Done.

How to disassembly Packard Bell LJ 75 and clean cooling system

Release wires from wire-channel.

How to disassembly Packard Bell LJ 75 and clean cooling system

Unscrew 4 screws, that holds cover with LCD.

How to disassembly Packard Bell LJ 75 and clean cooling system

Second one.

How to disassembly Packard Bell LJ 75 and clean cooling system

Third one.

How to disassembly Packard Bell LJ 75 and clean cooling system

And last one.

How to disassembly Packard Bell LJ 75 and clean cooling system

You can easily remove cover with LCD screen.

How to disassembly Packard Bell LJ 75 and clean cooling system

Unscrew marked screws. There is M2.5×3 screw in the top row in middle.

How to disassembly Packard Bell LJ 75 and clean cooling system

Done.

How to disassembly Packard Bell LJ 75 and clean cooling system

Release other connectors.

How to disassembly Packard Bell LJ 75 and clean cooling system

I use flathead screwdriver for this operation.

How to disassembly Packard Bell LJ 75 and clean cooling system

Remove top part of the housing. I started from this place.

How to disassembly Packard Bell LJ 75 and clean cooling system

Release latches in DBD-ROM bay by flathead screwdriver,

How to disassembly Packard Bell LJ 75 and clean cooling system

There are few latches :)

How to disassembly Packard Bell LJ 75 and clean cooling system

And remove top part.

How to disassembly Packard Bell LJ 75 and clean cooling system

The top part.

How to disassembly Packard Bell LJ 75 and clean cooling system

The bottom part with motherboard.

How to disassembly Packard Bell LJ 75 and clean cooling system

We almost done. Release this connector.

How to disassembly Packard Bell LJ 75 and clean cooling system

Connector is released.

How to disassembly Packard Bell LJ 75 and clean cooling system

Unscrew 1 screw that holds motherboard. Yes, yes, motherboard is held only by 1 screw!

How to disassembly Packard Bell LJ 75 and clean cooling system

Done.

How to disassembly Packard Bell LJ 75 and clean cooling system

Pull up the motherboard to remove them.

How to disassembly Packard Bell LJ 75 and clean cooling system

Disconnect fan connector.

How to disassembly Packard Bell LJ 75 and clean cooling system

Done.

How to disassembly Packard Bell LJ 75 and clean cooling system

Unscrew 3 small screws.

How to disassembly Packard Bell LJ 75 and clean cooling system

Remove fan.

How to disassembly Packard Bell LJ 75 and clean cooling system

Done.

How to disassembly Packard Bell LJ 75 and clean cooling system

The motherboard.

How to disassembly Packard Bell LJ 75 and clean cooling system

Look inside cooling system. OMG!

How to disassembly Packard Bell LJ 75 and clean cooling system

Cleaned id!

How to disassembly Packard Bell LJ 75 and clean cooling system

Almost perfect.

How to disassembly Packard Bell LJ 75 and clean cooling system

Assembly in reverse order :)

Good luck!

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3 thoughts on “How to disassemble Packard Bell LJ 75 laptop and clean cooling system”
  1. In step release antennas from WIFI card, how do you release the antennas? Pulling?
    I’m a little scared

    Excuse my bad English.

    Thanks!

  2. Can u send me maybe a pic where i can put the coolinggel between CPU and aircooler will be Nice. Cause he overheaded in few min after Start to Download or Play a Game.
    And thxs for this great Foto Report its a great help.
    Wasnt so easy to find it out alone.
    Mail to my email please.
    Thxs.

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