Casio W-800h Mod May 2026

: On the right side of the board (near the buttons), you will see a column of solder pads. Look for a closed solder jumper (a small blob of solder connecting two pads).

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.

: Gently lift the plastic module out of the case. Be careful not to press the side buttons while doing this. casio w-800h mod

: Use 18mm to 20mm adapters to fit a standard nylon NATO strap. This significantly improves comfort and gives the watch a rugged, military look. Watchuseek

: 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 : On the right side of the board

: Put the module back in the case and scroll through the modes. You should now see a TR (Timer) mode following the stopwatch. 2. Visual Overhaul: Negative Display & Color Filters

: You likely forgot the AC Reset . Open the back and short the AC contact to the battery. The watch uses the same internal module as

: Check the tiny "spring" on the PCB. It must make contact with the piezo speaker on the inside of the metal backplate. YouTube