The CASIO E-A400 dictionary is a French English Chinese dictionary sold in China.

We don't know what the OS it is using. We can't add more add-on dictionary to it. We want to know how to hack it.

This is the method to enter the hidden TEST MENU. Power off dictionary Hold the go-back key (for newer modules it is near the four navigation keys older modules it is on the left), the page up key and the power key for maybe 5 seconds until it beeps and the screen light on and popup a window shows the Model and the BIOS Ver Release the three keys and press the right navigation key two times then press enter key then it will beep two times and enter the hidden TEST MENU

If the dictionary is a newer module like E-A400 (released on 2010 in China) or E-B400 (released on 2011 in China) there is a password when you want to enter the MANUAL CHECK > SERVICE MENU. If it is an older module like E-SF300 (released on 2009 in China) there is no password when you want to enter the SERVICE MENU. The SERVICE MENU has tools that can backup the system file to the SD card. But now no one knows what the password is. Does anyone have any ideas about how to hacking the password?

Remove the screws in the back with a Phillips #1 screwdriver.

Insert a plastic opening tool to open the keyboard panel

Remove screws in the PCB and carefully remove the PCB from the back panel

This is the back panel

This is the keyboard panel with soft keyboard

The mainboard

SPANSION S29GL256N 256Mbit

ESMT M12L64164A 64Mbit

SAMSUNG K9GAG08U0D 2GB MLC

There is a space for another Flash Chip

The small display panel

The keyboard PCB and the mainboard PCB is pretty hard to seperate.