Casio W-800h Mod May 2026

: Unclip the metal cage holding the LCD to the circuit board. You may need to flip the PCB over to see the traces.

: This involves peeling off the original polarizing film from the LCD and replacing it with a new film rotated at a 90-degree angle. This turns the screen black with light-colored digits. N-O-D-E casio w-800h mod

or a copper braid (optional, to help remove excess solder). Tweezers for handling small components. Step-by-Step Instructions : Unclip the metal cage holding the LCD to the circuit board

The most popular modification for the W-800H is enabling the hidden countdown timer. The watch uses the same internal module as more expensive Casio models but has a specific solder bridge on the PCB that "tells" the software to hide the timer function. This turns the screen black with light-colored digits

: Before reassembling, use tweezers to short the point marked "AC" and the positive side of the battery for two seconds. This "reboots" the software to recognize the newly enabled feature. YouTube

: Gently lift the plastic module out of the case. Be careful not to press the side buttons while doing this.