● Covered by 1 source · 1 reportLow impact1 neutral
Magnetic watch bands can trigger laptop lid sensors, causing unexpected lock screens
Key points
- Magnetic watch bands can trigger laptop lid sensors.
- Laptops may unexpectedly lock or go to a black screen.
- The issue can be mistaken for hardware or software problems.
- The magnetic clasp's position near the laptop causes interference.
Unexpected Laptop Behavior
A user experienced an Acer Swift Go 16 AI laptop repeatedly going to a black screen and locking, which was initially attributed to a potential hardware or software defect. The problem occurred frequently during use, leading to troubleshooting efforts including system resets and discussions with the manufacturer.
Identifying the Cause
After extensive testing and even considering a faulty review unit, a colleague suggested that the user's watch might be the cause. The user was wearing a Galaxy Watch 7 with a magnetic clasp band, which, when positioned near the laptop, interfered with the internal lid sensor. This sensor is designed to put the laptop to sleep or lock it when the lid is closed.
Impact of Magnetic Interference
The magnetic field from the watch band's clasp was strong enough to activate the laptop's lid sensor, mimicking the action of closing the laptop lid. This led to the system locking or the screen turning off, creating a user experience issue that was difficult to diagnose without understanding the external magnetic interference.
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Reporting from
Magnetic clasps on watch bands can inadvertently activate the lid-closed sensor on laptops, leading to the screen going black and the system locking. This issue can be misdiagnosed as a hardware or software fault, but is caused by the magnetic field interfering with the laptop's internal sensors.