Download the 3.5″ LCD Display firmware update from the following link
For S/N-9604xx, 9Bxxxx, 02xxxx Firmware for 3.5″ LCD Display
http://bigc.com/download/AMK4X-CMF401-20091211.rar »
For S/N-70xxxx-95xxxx Firmware for 3.5″ LCD Display
http://bigc.com/download/AMK412_12_25-20081225.rar »
Unzip the file onto your SD Memory Card (support up to 16G class6 SD card). Insert the SD Memory Card into the AMK412-C200 / AMK4012-C200, make sure your AMK4xxx-C200 is plugged into the AC Adaptor before upgrading Turn on your AMK4xxxx-C200.
Press the Menu button 3 times. (This should cycle to Picture, Video, then finally Menu)
Scroll down on the menu and select Firmware Update