I fixed this on my A158 (basically a silver F91) by replacing the backlight spreader. Super simple mod and only costs about $12. Granted that's close to the cos

I fixed this on my A158 (basically a silver F91) by replacing the backlight spreader. Super simple mod and only costs about $12. Granted that's close to the cost of the watch itself. https://www.etsy.com/listing/1448973768/back-light-spreader-for-casio-f-91w-a https://www.etsy.com/listing/1448973768/back-light-spreader-...