I've had my Garmin Forerunner 235 for about 3 years now.
About a year and a half ago I started experiencing trouble with the GPS signal. It always took the watch between 5 and 10 minutes to fully detect a GPS signal and I followed some advice here on the forum that said to delete REMOTESW/epo.bin and then sync the watch, which worked. It seems however that this problem keeps coming back - every time I can fix it by deleting epo.bin, but I'm having to do that more and more often now.
More recently (last half year), I've also started experiencing issues with the heart rate monitor. At first it seemed the heart rate was about 20-30 beats too low at the start of my exercise. It would go up to the right rate after about 15-20 minutes. Recently it stopped measuring my heart rate altogether (even though the heart symbol is beating, it just shows --) or it's way too low (like a constant 60 or 70 during mild exercise where it should be 110-120)
I'm hoping someone could give me a few tips on how I could fix these issues, cause frankly the watch has become unusable