I would post pictures of the inside of my Casio Prizm, but since it has a special condition ("a poor repair job from Casio's service center in a south European country"), I believe it's best if I don't do it, to avoid confusion. They, along with pictures of "normal" Prizms, are widely available on other websites, including a nice curated list of links on the Prizm Wiki, so I guess not much is lost.
As for the tear down, it's really simple:
1. Remove the battery cover;
2. Remove the batteries*;
3. Unscrew all the screws on the back, including those on the battery compartment. The screws are all the same;
4. Profit!! Be careful not to lose the reset button. For even more profit,
5. Unscrew the two screws holding the circuit boards in place;
6. Gently lift them (be careful not to break any connections);
7. Extra profit!!
When putting everything back together, take care to make sure the battery springs go into their correct positions in the case. You really don't want to break them, if you do, you better have soldering skills
Also, in case more people have the screens of their Prizms lightly scratched: it's an unfortunate property of the plastic they used. I'm yet to see a screen protector for the Prizm that doesn't look ugly.
* People for the Ethical Treatment of Prizms recommends that the calculator be properly turned off before removing the batteries, to avoid damage to the highly vulnerable flash memory component (and to save me from hearing more stories about dead Prizms).
As for the tear down, it's really simple:
1. Remove the battery cover;
2. Remove the batteries*;
3. Unscrew all the screws on the back, including those on the battery compartment. The screws are all the same;
4. Profit!! Be careful not to lose the reset button. For even more profit,
5. Unscrew the two screws holding the circuit boards in place;
6. Gently lift them (be careful not to break any connections);
7. Extra profit!!
When putting everything back together, take care to make sure the battery springs go into their correct positions in the case. You really don't want to break them, if you do, you better have soldering skills
Also, in case more people have the screens of their Prizms lightly scratched: it's an unfortunate property of the plastic they used. I'm yet to see a screen protector for the Prizm that doesn't look ugly.
* People for the Ethical Treatment of Prizms recommends that the calculator be properly turned off before removing the batteries, to avoid damage to the highly vulnerable flash memory component (and to save me from hearing more stories about dead Prizms).
