Why does the Red Light at the top keep flashing?

I have no missed calls, emails, messages, instant messages, vmails, but the red light is still flashing... what else could it mean?

For me it was weather bug causing it.

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Is it dangerous to look at the red light in the headphone jack?

I recently purchased an early 2009 model white MacBook. Today I was installing Windows on it and I noticed a red light coming out of the headphone jack. I thought there must be an LED in there to help you locate it in the dark. I was curious about it so I crouched down next to the computer and looked inside the jack to see what the deal was.
At the time I didn't know that there is such a thing as an optical audio jack. Obviously I now know that's what the red light was all about. Now I'm wondering if looking at that light could have injured my eyes. Is it a laser, an LED, or something else? Does anyone know how dangerous it is to look at that light? I looked directly at it from close range for perhaps 3-10 seconds, with eyeglasses on. I don't remember it seeming uncomfortable to look at.

Thank you both for your replies.
GfulDedFan wrote:
To the best of my knowledge, that light shouldn't be on when the port is empty.
Yes, my understanding is that that light should only ever come on when there is a Toslink mini-plug adapter inserted into it (or at least a regular 3.5mm analog plug). However, like you said, I've seen a number of posts on the internet about that switch that turns on the digital output (red light) getting stuck in the on position (even without having plugged in a Toslink adapter). My understanding is that in my case the light came on because I was in the process of installing Windows and the driver for the audio hardware hadn't been installed yet.
GfulDedFan wrote:
As far as harmful rays, I doubt that it would be harmful because I've read about this audio problem before but never with a cornea damage attached to it.
I did look inside the jack directly at the light. I think it might be the retina that would be at risk if anything, but in any case, I sure hope nothing was damaged.
JoeyR wrote:
The power for the lasers used for digital audio is very low.
Is it a laser?
JoeyR wrote:
Especially if you didn't find it uncomfortably bright.
I don't recall having a reaction that it was uncomfortably bright and then having to force myself to look at it. If it had seemed uncomfortable I don't think I would have continued to look at it.
I don't think I actually became concerned about it until I found out that the light is for digital audio output and wondered if it is a laser. Not that I recommend looking right at a bright LED either. But I wasn't expecting a bright LED either (let alone a laser) -- like I said, my first thought was that there must be an LED inside to make the jack easy to locate in the dark (I was in a darkened room at the time.
JoeyR wrote:
If you've ever, even very briefly, had a low power laser pointer hit your eye, you'd realize it is super bright.
Fortunately I haven't, but someone who did have a laser pointer aimed at their eye told me they noticed it when they felt a burning sensation on their eye.
JoeyR wrote:
Any damage would almost always be nearly immediate. If you haven't had a problem, you're fine.
Do you think any damage would be readily apparent right away, in the form of pronounced discomfort or noticeable vision problem?

What does the red light above the speaker mean?

Hi,
I have an Iphone 4 running IOS5. Just this morning, I woke up and a little red light was glowing above the ear speaker. The phone will not turn on, and is otherwise dead. I tried the hard restart and that doesn't work. Plugging into external power, or plugging into the computer does nothing.
Please help!

try it this time.
https://discussions.apple.com/message/8117095#8117095

HT2995 I have no audio output implementing the toslink digital , can see the red light at the input end to audio recv'r any thoughts

does the toslink output need turned on , currently there's a toslink connected to the headphone output , but no audio

Hello, what shows as Sound Ouput choices in System Preferences>Sound?
Also...
Open Audio Midi Setup in Applications>Utilities, see the input & output options & KHz setting there.

HT5783 My MacBook Pro (Mid-2009) digital output has stopped working. It turns on the red light at the other side of the plug, but fails to connect with my receiver. Output from Airport works fine.

It was working fine until now, and now suddenly, the sound is gone. I've tried PRAM and SMC reset. Nothing works.
Using the same cable with my airport express, through airplay, the sound comes out fine.
It wasn't working when on Mavericks, nor now, on Yosemite.

Hey marcalc,
Thanks for the question. I understand that you are experiencing issues with the digital output of your MacBook Pro. The following resource may provide a solution:
OS X Mavericks: If you can’t hear sound from your speakers
http://support.apple.com/kb/PH13841
If you’re trying to listen through a digital receiver
If you’re using your computer’s digital output port (not available on all computers), choose Apple menu > System Preferences, click Sound, then click Output. Make sure Digital Output is selected.
Make sure your computer is connected to a digital-ready receiver using an optical digital cable, and that your receiver is set up for digital input (see the information that came with your receiver).
Try adjusting the volume on your receiver. You can’t use the computer’s volume controls to adjust the volume while using digital output.
Thanks,
Matt M.

I've got a mac pro problem with the starting up, but also a red light on the logic board solidly on. Its not among the diagnostic led. It's located near the BT adapter and the front fans. Also the fans run loud also. any solutions?

Hi
I've got a mac pro late 2006, and i am having problem with it for quite a while now. the problem i am facing is the start up process, and the red light on the logic board. Earlier I've got the two led on the diagnostic leds 5 and 6 turned on without the diagnostic button being pressed, and i think those are related to the processors overtemp. I've managed to solve that by, removing the processors and re applying the thermal compound on the heatsink. what i have left now with is the red light on the logic board at the time i plugged in the power. At the same time when this light come on, the power indicator at the front panel come on as well. i am not sure what is this light relates to. We've replace the power supply too, and gone through the SMC reset but seems no help.
Any idea on the problem? I am desperate about it, and i will be greatful if anyone can help..
thanks and hope for your best solutions
Kari

I can't help directly with your problem but you might check here http://tim.id.au/laptops/apple/macpro/ for a service manual which could answer your question.

What does a red light near front camera signify?

My iPhone shows a tiny red light near its front camera, what does it mean when its on?

The red light is the digital in light, that is how it reads the headphone jack. The reason the sound doesn't work is because a switch to turn the speakers back on is stuck (note that if you boot the computer, you will hear the startup tone).
There are several ways to fix this...
Some have found that putting the headphone plug in and out several times (maybe twisting it a little) will work.
Others have used a toothpick to adjust the switch (I don't advise this because the toothpick may break).
Instead of a toothpick, many have used a paperclip (probably best to use an insulated one). I couldn't get this to work, but I would suggest straightening, folding in half, then twisting the paperclip and moving it around in the port.
You can also use a sewing pen/needle.
I have seen all of these methods online, but they didn't work for me. I took a que from this instrucable and cleaned my jack with a dry q-tip. I then cut off most of the end and turned it around inside the port. This worked, but after I put the headphones back in the same problem came up, I just did the same procedure again and it worked again (even after I plugged the headphones back in and took them out).
PS: I woud suggest putting some q-tips and possibly some scissors in your MacBook bag in case the problem arises on the move.

Why does my iPhone 5c have a red light on the top of it

my iPhone 5c has a red light on the top of it next to the speaker but it is only visible at night, it's really scary

It's the proximity sensor.

HT4059 what does the red light and 'not in store' mean

What does the red light in manage my books mean? And what does 'not in store mean'?

Hello Simon,
I believe you have two unrelated problems. The red light is only associated with the digital audio port and indicates the "mute" switch inside the jack that turns off the built-in speakers when phones are in use has jammed in the mute position. No way it should affect your ability to start the computer. That has to be something else.
Does your computer give the normal startup chime sounds when you turn it on?
If you are getting the normal startup chime and have a wired keyboard, boot while pressing the SHIFT key. Keep holding the SHIFT key until you get a desktop, then let go the key. At this point, do not try to do any work with the computer but rather see if it will restart normally (without holding any keys or key combos).

Why does Adobe sendnow work and the newest and greatest Adobe Send does not work?

Why does Adobe sendnow work and the newest and greatest Adobe Send does not work? I wasted about 8 hours on trying to get Adobe Send to upload 269 files that amounted to 469MB. When it did not work I made a zip file and after a lot of wasted run time that did not work. The first situation gives little indication of when a file is loaded compared to Adobe SendNow. In both cases with Send it failed with a message like only the first 50 can be loaded. When I went and looked none of them had been loaded. With the zip file (I wanted to hide the individual files so they would not be counted) it appeared to work but very slowly and finally said it was done and I went and looked and it had done anything for oever 2 hours except a false "I'm runninng" indication.
Thus, I took a chance with Adobe SendNow and it works great. It never gave me a limit on the amount of files nor on the size of the complete job. It shows me one file at a time when it has finished with the file uploading it. SendNow has never given me any problems.
Why woiuld you want to change the program from SendNow to Send without the newest program being the best, fastest, user friendly program of the two? It just doesn't make sense to me. I suggest that Adobe keep SendNow working until Send is fixed. I would also suggest that SendNow and how it looks be kept, called Send, then modify Send one thing at a time until you get it to the point you need it to be for Acrobat. I have heard nothing good and now I have experienced it that Send is a piece of junk. I wasted most of my work day on giving Adobe the benefit of the doubt to find out I made a very bad decision to trust Adobe to make good decisions on the transfer of a function to another place .... both Adobe's responsibility.without making it painless for your customers that totally rely on you. Don't throw away customer confidence as it is very hard to get it back.

Funny how you answer to "troll". (What's your handle on AT&T forums?)
Yep! Verizon living up to it's contractual obligations by not releasing updates. Caveat emptor!
I think there are some reasonable expectations here to keep customer's happy. When one carrier offers upgrades there is an expectation the same will happen across all the carriers. We have seen that except Big Red.
Verizon could have said the update is in MS court months ago and stilled the voice of the disgruntled, or at least redirected it, but instead chose to be silent. Not for market share but for partial blame I think.
We will have to agree to disagree since you only see Terms & Conditions and I, see customer satisfaction.

I have a regular usb mouse and it isn't working. It sometimes clicks, but it can't make the cursor move. The red light will not turn on.

I have been using a mouse with my MacBook Pro for a very very long time now:
Optical USB Mouse:
Product ID:    0xc016
Vendor ID:    0x046d (Logitech Inc.)
Version:     3.40
Speed:    Up to 1.5 Mb/sec
Manufacturer:    Logitech
Location ID:    0x06200000 / 3
Current Available (mA):    500
Current Required (mA):    100
I'm running OS 10.6.8 on a MacBookPro that is fairly old.
The mouse is detected on the USB port, either one, but the red light won't light anymore so I can't use it to move the cursor. I've tried rebooting, I've tried the cammand-option.P.R thing. Still no red light.
Help?

Mouse Gas?
I took both of them to work and both worked fine in a different Mac laptop. I brought home two other mice and they both work here in my home computer. That works, but I wish I knew why the first two don't work at home because the logitec mouse I bought for home has very light action and the center wheel needs only a very light touch. I really really liked it and can't find one like it to replace it with.

I have been trying to chat to Apple support online but every time I click on something, I get a little box with writing that obscures the click I want to make, for instance if I click on the red light, it gets obscured by some writing. Very annoying. An

Does anyone else have the problem of clicking on something, say, for instance the red light, and then getting a little box of writing which obscures the red light so that nothing happens. I am getting terribly bored with this problem. It happens over and over again and then eventually I click again and the box with writing goes away and I can clcik the red light. Difficult to explain.

Can you provide a screen shot of this "Red light" phenomenon?
Press, Shift-Command 3
Use the camera icon to upload the shot from your Desktop.

Phone died and I put it on the charger and the red light keeps flashing.

Phone died and I put it on the charger (wall charger) and the red light keeps flashing. It's been doing that for a little less than an hour, I pulled the batttery twice & get the same light flashing. I also read othe posts and it says to just let it charge for a few hours but i don't think it's gonna work. If you know anything about it let me know please & thank you.

When connected to the charger, is the "no battery" symbol showing?
Leave the device to charge 2-3 hours, and then, still connected to the USB cable, remove the the battery from the device a few seconds and reinsert it. If it boots--leave it to charge to 100% (check Options > Status for the percentage). If it doesn't reboot on the first attempt, leave it several more hours. I've had one charge for two days before it came back to life after an extreme battery depletion. Every 3-4 hours, with the device still connected to the charger, you can remove and replace the battery to see if it reboots.
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Why does my trackpad stop working, the batteries are fine.

Why does my trackpad stop working, the batteries are fine.

Try expanding your question a little bit.... how is it not working? Just saying it "stopped working" isn't really saying much.
Like does it work sometimes and it intermittendly stops? Is the light on the power button not on?
Does it sometimes not click things? (always remember the actual trackpad buttons are actually on the buttom of the trackpad so you have to give a decent click on the pad to make it work)

My Mac charger is plugged in and the red light is showing however on the laptop screen it doesnt show that its charging?

my mac charger is plugged and the red light is showing however on the screen it does not show that it is charging. does that mean my charger is not working?

We all would like to know more details - Kappy too!
Tell us a Story - with a beginning, a middle and end. We need to understand everything that you know and have experienced.
If this issue is new, tell us what immediately preceded its onset - add software, upgrade or update? New equipment?
Quoted from  Apple's "How to write a good question"
To help other members answer your question, give as many details as you can.
Include your product name and specs such as processor speed, memory, and storage capacity. Please do not include your Serial Number, IMEI, MEID, or other personal information.
Provide the version numbers of your operating system and relevant applications, for example "iOS 6.0.3" or "iPhoto 9.1.2".
Describe the problem, and include any details about what seems to cause it.
List any troubleshooting steps you've already tried, or temporary fixes you've discovered.
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Why does the Red Light at the top keep flashing?

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