Mudmaster
Hello Mr. Hyde,
It sounds to me like your Mudmaster might have been magnetized by a strong electromagnetic signal; which could have been caused by several circumstances / items found within your house.
This would cause the calibration signal to not come on or malfunction overall. You can check the alignment of the hands vs. the display on the digital display and see if these two match. Meaning if your analog hands display a time of 14:00 and 15 seconds the same exact readout should be mimic by your digital display on the watch. If they do not match then you have to perform what the manual refers to as: "Hand Home Position Adjustment," found on page E39 in the manual which came with the Mudmaster.
This should readjust your analog / digital display and will tell the module that everything is functioning properly and the watch is ready to perform all of the functions which is programmed to do. However, you also have to keep in mind that the signal calibration can be and will be affected by exterior obstacles such as buildings, electronic equipment like computers, televisions, tables, and even cell phones; also, you have to take account or consider your overall geographical location in relation to the calibration towers found around the world. The closets one to your location would be the one found in Mainflingen Germany which only covers at its farthest range the island of Sicily. Way above your location and thus, the Mudmaster would NEVER calibrate to begin with.