Tools

Speed Test
Emulator for Raspberry Pi
Laptop Cleaning

Temperature reduction for 3 models: to 12 ... 20 degrees celsius

Speed Test

Here the log of the installation of the python code and the test:

Installation:
pi@raspberrypi ~ $ sudo apt-get install git-core
Reading package lists... Done
Building dependency tree
Reading state information... Done
git-core is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.

pi@raspberrypi ~ $ git clone https://github.com/sivel/speedtest-cli.git
Cloning into 'speedtest-cli'...
remote: Counting objects: 208, done.
remote: Compressing objects: 100% (133/133), done.
remote: Total 208 (delta 108), reused 167 (delta 74)
Receiving objects: 100% (208/208), 37.67 KiB, done.
Resolving deltas: 100% (108/108), done.

Initiate Speed Test:

pi@raspberrypi ~ $ cd speedtest-cli/
pi@raspberrypi ~/speedtest-cli $ python speedtest_cli.py

Speed Test Result:
Retrieving speedtest.net configuration...
Retrieving speedtest.net server list...
Testing from Cablecom GmbH (178.82.157.75)...
Selecting best server based on ping...
Hosted by SolNet (Solothurn) [59.31 km]: 289.361 ms
Testing download speed........................................
Download: 36.04 Mbit/s
Testing upload speed..................................................
Upload: 3.28 Mbit/s
pi@raspberrypi ~/speedtest-cli $

Emulator for Raspberry Pi

Download the qemu.zip from here.:

http://sourceforge.net/projects/rpiqemuwindows/files/

and just start the "run.bat" and do the installation as you normally do.

Laptop Cleaning

Considerations:
- your laptop is getting too warm, the case is heating up
- your laptop is too noisy even if it is idle
- your laptop CPU temperature monitoring application showing the CPU is the region of 50-55 Celsius in idle state
- your laptop is more than 2 years old sitting in a office environment (where the air circulated by aircon)

All these above meaning that the laptop cooling system has a bad performance.
Leaving your laptop as it as will cause rapid overheating of the CPU as more application starting, and running an overheated CPU will result in permanent damage and in case of the overheating protection activated it will result in performance degradation.

Conclusion: ACTION REQUIRED!!!

The following tasks are very risky as for inexperienced person and it can end up destroying the laptop.

WARNING: TRY IT ON YOUR OWN RISK
but much better if you CONTACT A COMPUTER h/w SPECIALIST

Step 1: Tools
photo: 0_tools.jpg

There are many very small screws in the laptops and the lengths are different.
Common mistake is that you mix the screws when you try to assemble it back and in the worst case scenario you use a
longer screw and break the motherboard.
You need a pressurized air spray to clean the inside

Step 2: Removing the parts
- Remove the battery and press and hold the power button of the laptop for 5 seconds.
It is needed to discharge the internal capacitors.
- Then start unscrewing all the tiny screws one by one on the bottom and make a remark which positions each was in.
- Remove the Hard disk drive (screwed to the case)
- Remove the CD-ROM/DVD Drive (screwed to the case)
- Remove the Memory Card cover (screwed to the case)
- Remove the Memory card by moving the two side fixture outside
- Remove the top side cover - usually need a screwdriver to pop it off
- Remove the Keyboard - usually screwed to the case by 2-3 tiny screw accessible after removing some top cover

We need these to be removed to make the laptop case as open as possible and when the air cleaning starts the dust can
fly out freely

Step 3: Cleaning
The compressed air spry has a high pressure, so it is better to start spraying from a distance.
Nicely clean all the parts at the heat sink and the fan blades. You need to use a pipe to reach all areas of the fan
and the motherboard.

Use the air pipe to clean the side grills of the laptop at the fan.
Do not use too much pressure on the fan blades as it can destroy the weak fan axis

WARNING: the pressurized air spray will create MOISTURE, so try to use it carefully, do not drop any moisture/water on
the motherboard.

After cleaning the motherboard and cooling system you can clean the removed keyboard and the display as well.

Photos: 1,2,3

Step 4: Assembly
- Fix the Keyboard (note which screws you have to use)
- Put back the front side cover
- Install the Hard disk drive (screwed to the case)
- Install the CD-ROM/DVD Drive (screwed to the case)
- Install the Memory card by moving the two side fixture inward
- Install the Memory Card cover (screwed to the case)


Step 5: Wait!
Drive out to KFC or BurgerKing for a lunch or dinner as remember the pressurized air spray will created MOISTURE, so
you have to wait till it dries out.

Step 6: Reinstall the battery unit and connect the DC adapter and turn on the laptop (and Pray :-)
The laptop should start and now you can check the CPU temperature.

If you running linux you can check the CPU temperature with the following command:

acpi -t

Here is my result as an example for a Dell latitude D630 laptop used as a Ubuntu home server.

Before the internal cleaning the average idle running CPU temperature was around 55C

acpi -t

Thermal 0: ok, 56.5 degrees C
Thermal 0: ok, 54.5 degrees C
Thermal 0: ok, 54.5 degrees C
Thermal 0: ok, 63.5 degrees C
Thermal 0: ok, 57.5 degrees C
Thermal 0: ok, 54.5 degrees C
Thermal 0: ok, 55.5 degrees C
Thermal 0: ok, 54.5 degrees C
Thermal 0: ok, 54.5 degrees C
Thermal 0: ok, 54.5 degrees C
Thermal 0: ok, 60.5 degrees C
Thermal 0: ok, 55.5 degrees C
Thermal 0: ok, 55.5 degrees C
Thermal 0: ok, 54.5 degrees C
Thermal 0: ok, 54.5 degrees C

After the internal cleaning and 30 minutes idle running the average CPU tempreture is around 34C

acpi -t

Thermal 0: ok, 32.5 degrees C
Thermal 0: ok, 32.5 degrees C
Thermal 0: ok, 32.5 degrees C
Thermal 0: ok, 34.5 degrees C
Thermal 0: ok, 38.5 degrees C
Thermal 0: ok, 38.5 degrees C
Thermal 0: ok, 35.5 degrees C
Thermal 0: ok, 34.5 degrees C
Thermal 0: ok, 34.5 degrees C
Thermal 0: ok, 33.5 degrees C
Thermal 0: ok, 33.5 degrees C
Thermal 0: ok, 32.5 degrees C
Thermal 0: ok, 32.5 degrees C
Thermal 0: ok, 32.5 degrees C
Thermal 0: ok, 32.5 degrees C
Thermal 0: ok, 32.5 degrees C
Thermal 0: ok, 32.5 degrees C

The internal cleaning gives an incredible !!!!! 20C !!!!!! lower temperature on the CPU
The laptop became noiseless and stable again

Attention: Laptop Cleaning Service available on specific laptop types, please contact me for details

CPU temperature monitoring in Windows 7.

You can monitor the CPU core temperatures real time if you install
1. PC Meter and
2. All CPU Meter gadget

from here http://addgadgets.com/download/
You have to go the the All CPU Meter Gadget options and select PC Meter to enable the temperature measurement.

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