Results are diagnostic signals, not a manufacturer certification or repair diagnosis.
A pass is scoped evidence
A passing browser check means the current browser, permission state, operating system, driver path, and device produced the observed behavior at that moment.
A failure needs isolation
Repeat in another browser, operating-system surface, port, cable, power state, account, and known-good peripheral before assigning a component cause.
Physical and official checks remain necessary
Safety, swelling, liquid damage, connector wear, firmware passwords, activation locks, SMART data, thermal behavior, serial identity, and warranty status require other evidence.
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