A magnetic watch band laptop problem that looks like a flaky touchpad or bad motherboard may be something much dumber: the clasp on your wrist. Tom’s Hardware reported that a magnetic watch band repeatedly caused an Acer Swift Go 16 AI review unit to blank its display and drop to the Windows lock screen.
The problem appeared while Tom’s Hardware was setting up and photographing Acer’s Swift Go 16 AI, a mid-range 16-inch laptop with AMD’s Gorgon Point silicon, an IPS display, a metal chassis and a large touchpad. The screen would briefly go black while the reviewer typed, then Windows would show the lock screen.
Tom’s Hardware said Acer engineers initially suspected a software conflict and recommended resetting the system. The reset did not fix it. The reviewer then suspected an electrical fault around the touchpad and Acer sent a second unit.
The actual diagnosis came later in Tom’s Hardware’s New York office, after Tom’s Guide lab tester Arif Bacchus watched the behavior and suggested the watch might be involved. The reviewer was wearing a Galaxy Watch 7 with a third-party band that uses a magnetic clasp positioned behind the wrist.
Why does a magnetic watch band lock a laptop?
Many laptops use magnets and lid sensors to detect when the screen is closed. Tom’s Hardware found that the Swift Go 16 AI has a magnet in the upper-right display bezel and a corresponding sensor area in the lower-right deck; a magnet near that spot can trick the laptop into thinking the lid has shut.
In this case, moving the wrist across the lower-right edge of the keyboard deck was enough to trigger the sensor. Tom’s Hardware said it reproduced the same behavior with a refrigerator magnet, a magnetic Qi2 accessory and a borrowed Apple Watch fitted with a magnetic band.
The finding matters because the symptoms do a convincing impression of hardware failure. A user could reasonably blame the touchpad, Windows, the display, or the laptop itself, then return the machine or start an RMA process for a device that is behaving as designed, just in an unhelpful way.
Tom’s Hardware said the second Acer Swift Go 16 AI unit Acer sent behaved the same way with the watch band, which points away from a one-off defective sample.
How common is this problem?
Tom’s Hardware said it could not reproduce the issue on four nearby laptops from Dell, Apple, Lenovo and Framework. The reviewer also said the same watch band had been worn for roughly 14 months while handling many laptops at trade shows without previously seeing the screen blank or lock when resting a hand on the deck.
The problem is documented elsewhere, though not widely. Tom’s Hardware pointed to discussions on Reddit and support forums from Apple, Dell and Acer, plus a Medium post about Apple Watch bands confusing Chromebooks. Older reports have also mentioned magnetic bracelets causing similar behavior.
The practical fixes are low-tech. Users can switch to a non-magnetic watch band, wear the watch on the other wrist, remove it while working, or return a laptop if its sensor placement does not get along with a favorite band. The annoying part is not the physics. It is how easily the failure mode masquerades as a broken PC.
This story draws on original reporting from Tom's Hardware.
