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Unknown Socket

I've have this socket on my laptop (Lenovo Z570).

What is this port and what is it used for? And what does that symbol mean (I expected a LOCK symbol)?

Ragav Ssr
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1 Answers1

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That is a Kensington lock used for anti-theft purposes. It is attached by means of a cable from something stationary, such as a table, to the device. The cable will then lock at one end from the port, preventing theft. This is much like a bike and it being locked to a railing or something being anchored to prevent removal. An example of a Kensington lock and cable on a PowerBook G4 (from Wikipedia):

Without the lock installed:

enter image description here

With the lock installed:

enter image description here

Here, the lock is attached to the corresponding port on the G4, and to the table, preventing theft of the device. Another example of the lock being used:

enter image description here

There are many kinds of these locks, by the Kensington company. See their page for details.

Andrew Li
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  • And in 99 of a 100 cases you can yank the lock straight out of the slot with only minimal damage to the laptop casing. Very expensive locks and only a deterrent to casual theft. A professional thief will simply use a bolt-cutter to remove the lock. Takes at most 30 seconds without damaging the laptop. – Tonny Dec 25 '16 at 15:18
  • In 100 of 100 cases, this wire can be cut in two snips with a pair of pliers :/ – user400344 Dec 26 '16 at 12:00
  • Yup. Extremely easy to break/snap/yank and super annoying to the user all the time. This thing has no justification, regardless of its price – Dr.Ping Dec 30 '16 at 14:10
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    @Dr.Ping - Its value is that it deters entirely casual theft. From the kind of thief who doesn't habitually carry pliers. – Valorum Apr 30 '18 at 16:09