Introduction
If the heart rate monitor on the watch no longer detects your heart rate, then replacing the back may fix it.
Tools
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Flip the watch over so that the face is down.
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Using a Y#0 screwdriver, unscrew the four 3.5 millimeter tri-head screws.
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Insert a plastic opening tool between the top and bottom portions of the case, and gently pry off the back.
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Conclusion
To reassemble your device, follow these instructions in reverse order.
One comment
And where do you get the new replacement back? And does it just snap back on?
The warning to turn off the watch to avoid electrical shock was a joke, right?!
nanev -