How the fault appears
- heart-rate LEDs do not activate
- heart rate or steps are inaccurate
- GPS takes too long or loses position
- compass, altimeter or rotation does not work
Model-specific repair · all Serbia
Smartwatch sensors, heart-rate monitor or GPS not working
Measurement failure may be software-related or caused by a dirty rear window, poor module contact, impact, corrosion, sensor failure or missing sensor power. We accept watches in Belgrade or by courier from anywhere in Serbia.
90 days on labor, 6 months on parts5.0 · 10 Google
What to do before service
Before service, clean the rear glass with a soft cloth and test on the other wrist without overtightening the strap.
What we test during diagnostics
- permissions, mode and software-setting check
- optical-window cleaning and inspection
- sensor flex, connector and power test
- board inspection after impact or liquid
Possible repair work
- sensor contact and flex restoration
- compatible sensor module replacement
- board power or communication-line repair
- software recovery and calibration when available
Models relevant to this service
Garmin Fenix 6→Garmin Fenix 7→Garmin Fenix 8→Garmin Forerunner 255 / 265→Garmin Forerunner 955 / 965→Garmin Venu 2 / 3→Garmin Instinct 2→Garmin Epix Gen 2→Samsung Galaxy Watch Active2→Samsung Galaxy Watch4→Samsung Galaxy Watch5→Samsung Galaxy Watch6→Samsung Galaxy Watch7→Samsung Galaxy Watch Ultra→Amazfit GTR 3→Amazfit GTR 4→Amazfit GTS 4→Amazfit T-Rex 2 / Pro→Amazfit Balance→Amazfit Bip→Huawei Watch GT 3→Huawei Watch GT 4 / GT 5→Huawei Watch 4→Huawei Watch Fit 2 / 3→Honor MagicWatch 2→Honor Watch 4 / 5→Apple Watch Series 6 / 7→Apple Watch Series 8 / 9→Apple Watch Series 10→Apple Watch SE→Apple Watch Ultra→Fitbit Sense / Versa→Fitbit Charge 5 / 6→Polar Vantage / Grit X→Suunto 7 / 9 / Race→COROS Pace / Apex→Withings ScanWatch→Xiaomi / Redmi Watch→
Guide labour prices
The exact price depends on watch version, root cause and part availability. We provide a guide before diagnostics and begin work only after approval.
Watch diagnosticsFree
Battery replacementfrom 3,000 RSD
Screen / glass repairfrom 2,500 RSD
Button / flex / sensorfrom 2,500 RSD
Speaker / microphone replacementfrom 2,500 RSD
Other watch issuefrom 2,500 RSD
All smartwatch faults
Battery replacement→Display and touch repair→Watch not charging→Watch will not turn on→Button or crown not working→Liquid and corrosion damage→Mainboard repair→Battery drains quickly→Watch charges slowly→Works only on charger→No image on screen→Touchscreen not working→Restarting or stuck on logo→Sound, microphone or vibration not working→Will not connect to phone→Watch is overheating→Display lifted or detached→
Frequently asked questions
How much does “Sensors, heart rate or GPS not working” cost?
Smartwatch diagnostics are free. The exact price depends on the model, root cause and part cost, and is approved before work begins.
Can the fault be diagnosed from a photo?
A photo can show external damage and help identify the model. Power, charging and board faults require measurements after the device is received.
Can I send the watch by courier?
Yes. We accept devices from across Serbia. Send the model, symptom and city first so we can advise on packing and whether to include the charger.
Do you begin repair immediately?
No. We diagnose first, report the cause, available options and exact price, and begin only after your approval.