Since I encountered some problems with the internal Broadcom Bluetooth module in my laptop, I always wanted to remove this piece of crap. The module is (or was *g*) a Broadcom BCM92045NMD.
The problem with it is, that it always blocks my wireless when it is in inquiry mode. I was able to see all wireless networks around me but the wireless card was not able to connect to them. When I start a connection with the Bluetooth module to some Bluetooth device, the wireless works. But only as long as the connection withe the Bluetooth device is enabled. The problem occurs in Windows and Linux so it seems that it is not a software problem. I tried some Bluetooth USB dongles and they all worked perfect. So I decided to remove the internal module.
Today I finally got the time to do it. I always loved to assemble my own computers. So I did not stop after I found the module. I kept going till the end and did a full (dis)assembly instruction for this laptop. I hope it can help some other people, cause I know how hard it is to open a laptop computer even if it is just for cleaning.
Btw. cleaning just the fan of the JFL92 is very easy. But you will find all this in the HowTo.
The manufacture of the case is OK. It is made of plastic but it is solid. The main reason for buying it was the price, the possibility to customize the system and that it comes without any operating system.
- Fingerprint reader
- 2 megapixel webcam
- 4 USB 2.0 ports
- One 1394 firewire slot
- Card reader for SD and media cards
- Gigabit LAN
- 56k Modem
- VGA out
- One PCMCIA slot
- Audio In/Out
All other equipment (CPU, RAM, etc.) is optional and can be selected by the customer.
Opening your laptop will cause the loss of warranty. You also may break some devices or the whole laptop. If you know what you are doing, keep reading. You should at least have some basic knowledge about computers and electronics. Opening the case of any electronic device can cause electric shock!
I am not responsible for any damage you do to your laptop or to yourself.
Following this HowTo is at your own risk!
Here are some advices you should read before you start. They may help you to keep an overview about what you are doing and can make things a lot easier.
Things you need:
- Small, non magnetic cross slot screwdrivers.
- A small normal slot screwdriver (non magnetic, too)
- Sharp knife
- Adhesive tape
- A brush
- Some bins to put in the screws
You shalt not…
- … use force to remove anything. If you do so, believe me, you will definitely break something. If something is jammed or stuck, take a break and check what exactly is the problem.
- … touch any electronic parts inside. Electrostatic charging may destroy electronic components.
- … forget loose screws inside the case. It is not that bad if you have some screws left after re-assembling the laptop (Ok, it is bad but it could be worse). But if you left some inside you will have a big problem when you turn it on again. Loose screws can cause short-circuits.
You shalt …
- … sort the screws you removed.
- … name the cables you disconnect from the devices inside the laptop (if they are not marked already).
- … read the complete disassembly instruction one time before you start with the work.
1.1 Basic Cleaning
If you notice some high system temperature and your fan is running with full rotation speed most of the time, it may be time to clean the cooling system. Another sign that it is time to clean the cooling system, could be random system crashes during high system load times.
The basic cleaning is very easy due to the case design of the JFL92. With basic cleaning I mean the cleaning of the fan and the cooling fins, because those are the parts that get the most dust during utilization of your laptop.
To clean the fan and the cooling fins, you just have to open the big cap (marked with the red “X”) on the bottom side of the laptop.
Unscrew the tree red marked screws and unplug the green marked fan-power-plug. Thats it. Take out the fan and you have free access to the cooling fins. now clean the fan and the cooling fins with the brush. Be careful that you do not press any dust in between the cooling fins.
Be very careful when you re-assemble the fan. The tree screws may fall into the case! Do not forget to plug in the fan before you close the cap!
1.2 Additional Cleaning
This part will demonstrate some additional cleaning like the keyboard. Sometimes it is necessary to disassemble the keyboard to clean it. This is also very easy with the JFL92. Be very careful with the following steps. think about that the case is only made of plastic and that you may break some little plastic clamps when using too much force.
At first you have to close the laptop lid and annul the cover of the hinge. Do this for both sides.
After this open the lid as far as possible.
Now annul the cover of the hinges a little more, till you notice that the whole face plate with the power button starts to come loose.
The next step is to remove the whole face plate. Use the screwdriver with care.
After you have opened the face plate, it should look like this. Disconnect the red marked ribbon cable to be able to completely remove the face plate.
To remove the keyboard, you first have to unscrew the tree red marked screws in the next picture. After this pull the keyboard carefully in the direction of the screen. It will come loose.
The last step to remove the keyboard is to unplug it. To archive this just unplug the red marked ribbon cable.
Thats it. Now you can clean or replace (in case it is broken) your keyboard
So you want it the hard way? OK, here we go. Let’s dig deep into the bowels of the JFL92.
2.1 The easy stuff
As I mentioned, the case design of the JFL92 is very good. You can reach a lot of devices and modules with less effort. The next picture shows you the bottom side with all caps open. You can remove or replace all those modules and devices without opening the whole laptop. The 56k Modem is an exception, it is half below the case and there is a screw you can not reach without opening the whole case. But if you do not need it you can disconnect it by pulling out the little plug :-)
The Bluetooth module is also easy to reach. Just follow the instructions from 1.2 Additional cleaning. After you have removed the face plate it is a cakewalk to remove it. You should also remove its connection cable completely. To do this you have to remove the keyboard (you know how).
2.2 Let’s get it on
After we did the easy stuff like cleaning and removing some easy accessible modules, we now will open the whole thing for a deeper look.
At first unscrew all the screws you can find on the bottom of the case. Something that may help, is to fastening the screws with the adhesive tape I mentioned above. If you do this you can bes sure that you put the right screw back in the right hole and that you will not loose one of them.
Open all caps on the bottom side. Remove the hard drive and disconnect the wireless antenna cables (red marked). Remove the tape and you will find them. Please mark them that you do not mix them at later re-connection.
After this you have to remove the face plate with the power button and the keyboard (you may already have done this, if not see 1.2 Additional Cleaning). Now disconnect all in the picture marked cables.
There are some (like the one for the microphones in the lid) you have to take special care of. You have to lift the case of their jack a little (really just a little or you break it!) wit a sharp knife or a very small screwdriver.
2.2.2 Remove the screen
Thats it. Now we can remove the screen.
Open the lid as far as possible. Now you have to brace it with something, I used two books. If you do not do this, the weight of the screen may annul the screws and break your case when you start unscrewing them.
Now unscrew the red marked screws at the hinge mounts on both sides (two on the left and two on the right), as well as the green marked screw for the guard of the screen cables on the left side.
Remove the screen.
2.2.3 Open the case
At first you have to remove one little screw which was hidden below the edge of the scrren at the rear side of the case.
That was the last screw for the next time.
Now we start to open the case. Again I have you to remind to be very careful from now on. We start at the backside. On the picture you see those tiny plastic nipples (red marked). You have to use your small screwdriver to annul the case. Pull it to the outside, then the plastic nipples will be released.
Now we do the same thing all around the case. On the front side you have to use a little more force.
Congratulations, you have opened the case and you are now able to remove the complete cover plate.
2.2.4 Remove the mainboard
Now pull out the optical drive. Unscrew the red marked screws from the mainboard and unplug the green marked cable. The two blue marked cables should already have been removed in a further step. I left them connected when I took the picture. The same for the wireless antenna cables.