Mac headset Kong Liang red light no sound?

Users of the Mac believe that many have encountered the internal failure of the speaker, do not know that there is no careful user will find a Mac with the horn failure and the headphone hole will light up the red light, as shown in the following picture, that Mac headset Kong Liang red light is what reason? The following PC6 small make up to bring everyone mac headset Kong Liang red light , while the speaker has no sound solution.

To solve this problem, first of all, divided into two cases, whether there is a dual system.

One, if your Mac through Bootcamp installed Windows dual system and the headset Kong Liang red light, the speaker does not sound, the first thing to eliminate is the driving problem, this time we only need to reinstall the correct version of the Bootcamp driver can solve this problem.

Second, if your Mac is in the OS X system appears under the problem, relatively speaking, the reason is more simple, PC6 small knitting here to give you a brief introduction:

Inside the socket there is a mechanical switch, normal when the headset is inserted, the switch is turned on, then the MAC OS x system will know that a headset is plugged in, so the built-in speaker off, from the headset output sound signal, after the headset unplugged, switch automatically closed.

Careful users can find changes in the system, see the following figure, insert headphones and the sound changes in the system when the headset is not plugged in:

And one of the following is clear.

The problem is:

For various reasons, the switch may not automatically shut down, which can cause problems because the system does not think the headset is unplugged. And coincidentally, Apple's headphone jack also supports fiber-optic audio, which emits the red light when an external device is plugged in to turn on the fiber-optic audio input/output device.

Judging by this red light, from the online postings, a lot of Apple's professional maintenance personnel do not know, generally think that the main version of the bad.

Workaround:

Very simply, a toothpick can be--of course other fine things can be replaced.

Try to insert it into the headphone hole, and gently try different angles and positions, you will feel a little block, that place is that switch, find the right place to touch, the red light will go out, the red light went out on the normal.