[LED]Blue & Red Notification LED not working - Nexus 4 Q&A, Help & Troubleshooting

Hey all,
Sorry if a similar problem has been posted before, but my blue and red notification LED's aren't working.
The other day, i sent my nexus 4 away to get fixed (USB/charging port was broken), and when it was returned i noticed that all notifications flashed green.
I've tried:
- turning the "pulse notification light" on and off.
- Testing the LED via light manager (only green works).
So I've come to the conclusion that the red and blue parts of the LED are broken/faulty.
Is there another fix i could try ??
Perhaps the LED wasn't reconnected properly when being fixed, is it easily accessible ?
Thanks
-Craig

Craigw0w said:
Hey all,
Sorry if a similar problem has been posted before, but my blue and red notification LED's aren't working.
The other day, i sent my nexus 4 away to get fixed (USB/charging port was broken), and when it was returned i noticed that all notifications flashed green.
I've tried:
- turning the "pulse notification light" on and off.
- Testing the LED via light manager (only green works).
So I've come to the conclusion that the red and blue parts of the LED are broken/faulty.
Is there another fix i could try ??
Perhaps the LED wasn't reconnected properly when being fixed, is it easily accessible ?
Thanks
-Craig
Click to expand...
Click to collapse
The obvious answer is the one you're not trying to hear, and that is to send it back.
Sent from my Nexus 7 (2013)

GEEK LESSON.:thumbup::thumbup:
Multi coloured LED,s are nearly always made up of 3 colours any other colour emitted from them is a mix of those 3 colours this is controlled by different metals / mineral e.t.c inside the LED and a chip that passes a different current to the led e.g say you wanted green the current would pass through the gallium phosphate (band) part of the led thus creating green. ( Said in easy to understand terms)
What I am trying to tell you is its next to impossible for this to break .(LED,s are near on bomb proof).
Either a cheaper LED has been replaced (unlikely as they cost very little) Or a software fault. The other colours just don't break .
As Berrydroidcafe says if this is a genuine fix from a nexus approved service you have been ripped off and should seek another replacement or fix . That's if you can't live with just a green LED.
Below is a chart explaining the elements used inside the LED which makes up the different colour spectrum .
Sent from my Nexus 4 using XDA Premium 4 mobile app

Related

Notification LED Multicolor (App to toggle blue+green+amber led included)

I've written an app that can enable and disable the blue led with a toggle. I would like to know for who this works. Please test it and tell me .
Old Post:
ChaosR said:
For some reason my Desire went buggy and crashed at some point. However something amazing happened.
Contrary to popular believe, there are more colors than red, green and orange. My Desire's LED flashed blue and purple. Now I searched the forums and could not find any topic that confirmed this, nor on google, so just to let you guys know .
Next point on the list is finding an application that can tweak them
Click to expand...
Click to collapse
EDIT: Seeing the recent activity in this thread, I want to tell you this app was written a long time ago. It does not function on any recent roms. There are loads of other apps out there that can control your led.
Picture ??
lennshow66 said:
Picture ??
Click to expand...
Click to collapse
Gheh, it only showed for like a few seconds, then the phone restarted, I will try to replicate the bug, but I expect I will be unsuccessful .
Interesting. I got my Desire yesterday and installed the Touchdown app for corporate connectivity. In TD's settings you can customise the LED behaviour to select different colours (beyond red, green and amber) for different events. Tried it and it just flashed green, but why have these settings if there's not a way to do this...interesting
I have been able to replicate the bug. This is how I do it:
1. Turn on Bluetooth
2. Receive a text message while charging
3. Disconnect from charger
4. Turn off screen
5. Reconnect to charger
6. My led will glow purply
7. Disconnect the phone from the charger
8. Led starts flashing blue, orange and purple
9. Phone reboots
Taking pictures as we speak
Re: MultiLed Colors
I have been able to replicate the bug. This is how I do it:
1. Turn on Bluetooth
2. Receive a text message while charging
3. Disconnect from charger
4. Turn off screen
5. Reconnect to charger
6. My led will glow purply
7. Disconnect the phone from the charger
8. Led starts flashing blue, orange and purple
9. Phone reboots
Taking pictures as we speak
Click to expand...
Click to collapse
Interesting. Get these pics up ASAP lol
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I've added the images. It was too hard to take a picture of the blue color. But at least here is purple.
PS. images are in the first post
EDIT: Also, I should add, I have been unable to duplicate the color for a second time. No idea why it happens. Just happy I was able to get these pictures
i did what you said. no special colors but strange things happens. no reboot
Re: Notification LED Multicolor (Picture of purple included)
Looks like the desire does some how support multi colours :S there must be a way to enable this fully within the codes. I will be donateing if the devs can get this to fully work
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Re: Notification LED Multicolor (Picture of purple included)
I have to say u r pretty legendary to find that bug.
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supasye said:
I have to say u r pretty legendary to find that bug.
Click to expand...
Click to collapse
I have tried and tried and I have been unable to replicate this bug from this point on. I'm so happy I was able to take the pictures. I think it's because of a semi-faulty flash that I have this bug. Even though the randomality of it suggests it might be more of a hardware bug. We do however now know it has a blue led too. So cyan and white should be possible as well. I just wonder, why go through the trouble of a adding a full multicolor led, if you are only going to use 3 colors of the possible 7.
there might be something as simple as a voltage problem.
most leds will change color when you increase voltage and/or overload them.
the first few times you won't see any damage, but eventually the changing color might be permanent and then it's just a matter of time before the led just brakes.
so there is a change that it's not multi color, but the phone just overloads the led while crashing.
When I looked down the headphone port I could clearly see the red and blue led burning. I do really think there is a blue led in there.
Re: Notification LED Multicolor (Picture of purple included)
When I looked down the headphone port I could clearly see the red and blue led burning. I do really think there is a blue led in there.
Click to expand...
Click to collapse
Legend: D
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Haa nice one mate
Well we know there is a Red and Green led for definite so having a Blue as well means we have multi colour. Now we just need a way to use it
There's no way that type of colour came from overloading the phone as when an LED overloads it just blows, it doesn't change colour to that extent.
Re: Notification LED Multicolor (Picture of purple included)
Well we know there is a Red and Green led for definite so having a Blue as well means we have multi colour. Now we just need a way to use it
There's no way that type of colour came from overloading the phone as when an LED overloads it just blows, it doesn't change colour to that extent.
Click to expand...
Click to collapse
Agreed lol. Just need the devs to add the code somewhere to enable this colour
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This should really be moved to the dev section, let the guys play with it, i dont think too many devs trawl through the ****e on the general forum, with questions like "how do i make a call on my phone".. lollol
Start a new thread on the dev section, im sure this will be picked up by one of the wizzes
JD
Heh, I'm sorry guys, but we already know there's a BLUE led inside.
This LED works a bit differently from the other LEDs, however.
Theres no need to do advanced tricks to show the blue LED, you
can easily enable it:
echo 1 > /sys/devices/platform/leds-microp/blue/brightness
From within a terminal emulator.
the blue LED is, however, missing the 'blink' property, as the Green and Amber LEDs do.
And yes, it is also possible to turn other LEDs on at the same time, so you can make purple by enabling the BLUE and Amber LEDs.
ieftm said:
Heh, I'm sorry guys, but we already know there's a BLUE led inside.
This LED works a bit differently from the other LEDs, however.
Theres no need to do advanced tricks to show the blue LED, you
can easily enable it:
echo 1 > /sys/devices/platform/leds-microp/blue/brightness
From within a terminal emulator.
the blue LED is, however, missing the 'blink' property, as the Green and Amber LEDs do.
And yes, it is also possible to turn other LEDs on at the same time, so you can make purple by enabling the BLUE and Amber LEDs.
Click to expand...
Click to collapse
Then can we not just simply integrate that command into our applications for use of the blue LED?

[Q] Notification LED

So I was playing around with lightflow on my nexus 4 and I noticed that the red LED is kind of prominent when the notification light pulses when I have any color selected with red in it. There's a red glow at the top of the notification light when it pulses, which makes blue half purple, yellow half red-orange, and white pink/purple. The picture is kind of bright, but you can kind of see what I mean (it's supposed to be yellow). It's a lot more visible in real life... Does anyone else have this too?
cheeseypuffles said:
So I was playing around with lightflow on my nexus 4 and I noticed that the red LED is kind of prominent when the notification light pulses when I have any color selected with red in it. There's a red glow at the top of the notification light when it pulses, which makes blue half purple, yellow half red-orange, and white pink/purple. The picture is kind of bright, but you can kind of see what I mean (it's supposed to be yellow). It's a lot more visible in real life... Does anyone else have this too?
Click to expand...
Click to collapse
Looks yellow to me brotato.
But yes, I think it's normal to get glimpses of other colors. Happened on gnex and gs3 too.
-Sent from my Nexus 7.-
How do you even configure the LED I couldn't find a way to do this (never had a phone with notification LED before)
In fact I haven't seen the notification LED at all, I can't test SMS messages because my Micro-SIM isn't here yet, but all other kind of notifications had no effect.
Where do I find the LED settings
EDIT: Ok, It seems like there is a notification if I receive a mail (gmail), but not for all notifications. Is this normal?
(If you can tell me how it works I can check if I have a red glow)
Use light flow, download from play.
Sent from my HTC Explorer A310e using xda premium
Slightly topic related question. (apology for slight double post - question sits better here - not worth another thread)
Q1 : When charging I have no lights/led indicators illuminated (on both stock and aokp) - is this the normal? - intended behavior?
I'm used to HTC/Samsung, that tend charge at one colour (amber/red) and then display another colour when full (green). This would seem sensible to me, so that we ensure that we don't over charge the battery and over heat the phone?
Q2 : Another favour to ask: can someone please post a close up picture, of the two Nexus 4 USB cable plugs, as I've managed to confuse several USB leads and don't know which came with the Nexus, which I may need for an RMA return?
Thanks in advance
An RGB LED is basically 3 LEDs crammed into one housing. It's just like a pixel on your monitor, but larger. If you were to zoom in on your monitor you would notice the three individual colors. It just so happens that the red part of the LED doesn't diffuse throughout the housing as well as the other colors do.
karanrajpal14 said:
Use light flow, download from play.
Click to expand...
Click to collapse
I see, it's done using an app.
I can see a small red glow at the top (I guess) but it's really small and I wouldn't even have noticed without this thread. (Maybe it's because I am red-green colorblind, but I don't think this has a great effect here)
BTW: Is there a more advanced possibility to control the LED in Cyanogenmod or is it a good idea to pay for light flow (I'm especially interested in support of steam)?
ben_pyett said:
Q1 : When charging I have no lights/led indicators illuminated (on both stock and aokp) - is this the normal? - intended behavior?
I'm used to HTC/Samsung, that tend charge at one colour (amber/red) and then display another colour when full (green). This would seem sensible to me, so that we ensure that we don't over charge the battery and over heat the phone?
Click to expand...
Click to collapse
Yes, by default there is no LED notification of the charge status. You can use Light Flow (including the free version) from the Play Store to add this behavior, as well as controlling notifications for all sorts of events (not just LED notifications -- sounds and vibrations, as well).
You don't need to worry about overcharging the battery, though. There is a protection circuit built in that prevents issues of that sort.
ben_pyett said:
Slightly topic related question. (apology for slight double post - question sits better here - not worth another thread)
Q2 : Another favour to ask: can someone please post a close up picture, of the two Nexus 4 USB cable plugs, as I've managed to confuse several USB leads and don't know which came with the Nexus, which I may need for an RMA return?
Thanks in advance
Click to expand...
Click to collapse
--Here you go--
Hidden92 said:
BTW: Is there a more advanced possibility to control the LED in Cyanogenmod or is it a good idea to pay for light flow (I'm especially interested in support of steam)?
Click to expand...
Click to collapse
CM allows you to set colors and flash rate per app, Lite flow allows this too, Lite flow (paid) allows you to add additional apps beyond the standard ones (Gmail, SMS, Facebook, etc).
Brad S said:
--Here you go--
Click to expand...
Click to collapse
thanks, but I wasn't able to see any attachment? *confused*?
EDIT: I can now, XDA/browser issue, seen it now - so resolved and thanks
I'd suggest you try out the lite version of light flow first then decide to buy it or not. It's worth the price AFAIK!
Sent from my HTC Explorer A310e using xda premium

[Q] Notification Light No Red RGB values

I broke my screen a few days ago and had it taken in to be replaced. A few hours after receiving it I noticed the LED was blinking, but in strange colors different than those I set in Light Flow. The normally white notification is now cyan, yellow is now green, purple is blue. Red however doesn't display at all, so it seems that the red portion of the RGB scale is not functioning. Does anybody know what during the screen repair process might be causing this to happen? I'm almost certain its not software related as prior to having it repaired the LED was working correctly. Thanks!
There's a kind of filter for the LED on the display, not all replacement parts come with it and it's pretty easy to overlook.
DrFredPhD said:
There's a kind of filter for the LED on the display, not all replacement parts come with it and it's pretty easy to overlook.
Click to expand...
Click to collapse
There does seem to be a blue hue around the notification light area when held in the light... So could it be that this filter was mistakenly left on the old screen, instead of transferred to the new part? Or is it something attached to the screen that can't be moved from one part to the other?
It wound up being a damaged LED light

Dim leds on my Note 4's screen

Dear guys;
I own a Galaxy Note 4 which is no longer under warranty and I've just spotted that some LEDs in a row have got dim. Actually, to check the led lights I put my phone's screen under the microscope and just figured out that the problem is with the blue LEDs (some blue LEDs were producing less light there and the other LEDs were OK). I also checked whether it was for an effect or something but actually it was not. Actually all i found about the case on the web was about the dead LEDs (but my LEDs were still working) and I didn't find anything useful.
I'd REALLY appreciate it if you guys give me a solution to the problem because it's REALLY annoying. so thank you in advance
I wish you all the best
Maybe burned-in effect? On my Note where is the notification bar the screen is brighter (when bar is hidden). This week I will send it to the repair (mine is still under warranty)
Sent from my SM-N910C using Tapatalk

LED notification light not working

A day or 2 ago, my notification light has stopped working on my Samsung Galaxy s8
I tried restarting the phone and turning the LED indicator option in settings on and off. It doesn't seem to help or fix it.
I wonder if i should return the phone since its still in warranty and get a replacement because charging the phone works but LED doesn't show it's charging like that red dot on top of the phone.
Could somebody help please.
Thank you, Kenny
moomoopobo said:
A day or 2 ago, my notification light has stopped working on my Samsung Galaxy s8
I tried restarting the phone and turning the LED indicator option in settings on and off. It doesn't seem to help or fix it.
I wonder if i should return the phone since its still in warranty and get a replacement because charging the phone works but LED doesn't show it's charging like that red dot on top of the phone.
Could somebody help please.
Thank you, Kenny
Click to expand...
Click to collapse
Hi there, easy to diagnose.
Go to the phone dialer and dial this: #*0*#
A debug menu will appear, click the LED button (middle right).
It should light up the LED, click the screen to cycle between colors.
If this works correctly, then the issue is software/misuse/app conflict/whatever.
If it does not work correctly, then your LED needs servicing/repair.
Skander1998 said:
Hi there, easy to diagnose.
Go to the phone dialer and dial this: #*0*#
A debug menu will appear, click the LED button (middle right).
It should light up the LED, click the screen to cycle between colors.
If this works correctly, then the issue is software/misuse/app conflict/whatever.
If it does not work correctly, then your LED needs servicing/repair.
Click to expand...
Click to collapse
Hi thanks for the quick reply, i have just tried that it doesn't seem to work or light up for the LED indicator.
I think i might have to replace it tomorrow at the store.
Thank you
moomoopobo said:
Hi thanks for the quick reply, i have just tried that it doesn't seem to work or light up for the LED indicator.
I think i might have to replace it tomorrow at the store.
Thank you
Click to expand...
Click to collapse
There is a long discussion on this subforum about the LED issue, did you use any LED control applications?
Seems like something is killing the LEDs.
Just for future reference.
Skander1998 said:
There is a long discussion on this subforum about the LED issue, did you use any LED control applications?
Seems like something is killing the LEDs.
Just for future reference.
Click to expand...
Click to collapse
Hey ye i have had a look at the discussion in this sub forum and no i wasn't any sort of LED applications.
So i guess its my bad luck on getting a partial faulty device :/
Id assume its a hardware peoblem since they said reflashing the older firmware didn't work.
Thank you
(This was double posted from the main LED thread, don't know how to delete it, but it may help anyway)
To contribute to the discussion:
- there are some apps that only work in certain colors. For instance, Whatsapp is working with blue, but no other colors. I may have seen it blink once for another color, then never more.
- all apps using blue are working
- I have an app that is originally set to blink LIGHT blue and it is doing so.
- Telegram manages to blink pinkish
- charging is Red
- Fully charged is green (but again, green is not working on Whatsapp).
Looks like a software thing.

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