Saturday, May 21, 2011

How to replace a key on Acer Notebook Keyboard

No meter how careful you are with your laptop, sooner or later you will find your keyboard filled with dust, lint or even small pieces of food. Sometimes, all you have to do to clean your keyboard is to turn your laptop on one side and blow. But sometimes, dirt is sticking beneath a key and no meter how hard you will blow, the dirt will not easily go away. The annoying part is that the key with dirt will not work properly anymore until is cleaned.
In this post I will show you step by step how to remove, clean and put back a key from an Acer Notebook keyboard (Aspire 7736Z).

1. First, search for a small screwdriver. A tweezers is optional but can help.
I will exemplify on "J" key.

2. This step is the most important one and it will require you to handle the screwdriver very carefully.
The key have tow main pieces: the plastic part with letter on it (the part that you can see) and beneath an "X" mechanism. Gently insert the screwdriver beneath the hey, between the part with letter on it and "X" mechanism.

3. Now gently rotate the screwdriver until the part with letter on it detach from "X" mechanism. The part with letter on it have to detach from tow points.

Here are those tow connection points between part with letter on it and "X" mechanism.

4. The hardest step was to remove the part with letter on it. After that, you may also need to remove the "X" mechanism. The "X" mechanism is attached to the keyboard in three contact points. With the same small screwdriver detach the "X" mechanism from tow of the three contact points.

5. Now you can start the cleaning.

6. After you finished the cleaning, follow the steps back to the begining.
First connect the "X" mechanism to the lower connection point from the keyboard.

Then connect the "X" mechanism to the other tow connection points from the keyboard.

Now you are done with the "X" mechanism.

7. And the last part: attach the part with letter on it. First put the part with letter on it over the "X" mechanism and slided into the lower tow connection points of the keyboard.

When the part with letter on it is in the right place, press on the upper left side, then the upper right side until it clicks into the initial position.

This is it. Now you have a clean keyboard.

Friday, May 20, 2011

Opera - Remember choice and do not show dialog again - problem

I usually use Opera to surf on Internet. Opera is the fastest browser I've ever try, and it have a unique set of features that cannot be found on the other browsers. A couple days ago I was surfing some documents in Moodle. The documents type ware .doc, .docx, .zip, .txt... you get the picture. First, all those documents should be downloaded in order to be viewed. So when I press on a document, the "Downloas file" dialog appears. From this dialog you can select either Save or Open button. I usually use Open to directly open the document with the appropriate application. If the type of the document is .doc it will be opened by MS Word, if the type is .txt it will be opened by Notepad.
In addition, this dialog have an interesting option, "Remember choice and do not show dialog again", which I ignored for a very long time, until tow days ago, when by mistake I select the option's checkbox.

From that moment the Opera changes his opening behavior: all files are now opened with MS Word, even .pdfs or .txts. So the question is how can we undo the checkbox selection?

1. What happened when I selected the checkbox?
When I selected the chekbox from "Downloas file" dialog, in Opera was added a new MIME type called "application/x-forcedownload". And because I selected the chekbox when I was opened a .doc file, by default the "application/x-forcedownload" type is opened by MS Word. This was happened because in Moodle all download-able documents have the type "application/x-forcedownload". So when I try to open a .zip file in Moodle, the web server says to Opera "this file have the type application/x-forcedownload" and try to open the file with default application, MS Word.

However, when you will try download / open a zip file from other website, most probably that you will not have any problems, because the website tells to Opera "this file that you want to download have the type application/zip", so Opera will open the .zip file with the correct application.

2. How can you undo this behavior?
To undo the changes made when you click by mistake the checkbox in "Downloas file" dialog, all you have to do is to remove the MIME type called "application/x-forcedownload".
To do this follow the steps below:
- Open Menu Settings > Preferences > Advanced > Downloads
- Uncheck "Hide file types opened by Opera"
- Enter "doc" in Quick Find
- Select "application/x-forcedownload"
- Click "Delete" button

This is it. Now is back to normal.