T420: Backlighting problem

Hello everyone, I have a Thinkpad T420 (6 months old) and I think I have a backlight problem. The backlight vanish at the startup of the computer and when I boot in Safe mode. Can anybody helps me ? Thanks !
Moderator Note: Edited subject to match content.

Hmmmm ... have you tried increasing the brightness? Any on screen display showing the brightness bars?
You can try uninstalling power manager, power management driver and hotkeys package then do a reboot then install all 3 again and see if it helps.
*Non Lenovo employee*
I have a Y2P (i5) ... Feel free to ping me if you want me to test some applications with your Y2P if you have the same model. I don't mind keep doing recovery on it if needed .... =)

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IPod backlight problem...

Why isn't my iPod touch 2G 16GB's display not turning on? I know it's a backlight problem because I can faintly see the apple logo sometimes.

Bump

Again me - n73 backlight problem

Hi
my n73 has a backlight problem.Under a special angle ( there are dark stains.They are HARDLY noticable.

Maybe is the screen. Go to a Nokia Service to check that.

Xfce4-power-manager and laptop-mode-tools + backlight problems.

Cross posted from here: https://bbs.archlinux.org/viewtopic.php?id=127992
I don't know which forum it belongs to, so maybe a mod can close the one in the wrong forum.
Out of curiosity, do these two tools conflict with each other? There seems to be some features that do the same thing, ie harddrive spin down time, but I'm not sure if these two will try to kill each other trying to configure the same power settings. If they do conflict, how could I go about disabling the conflicting parts (on either)? laptop-mode-tools claims it needs acpid "for ACPI support", however, acpid seems to be grabbing the standby event and throwing the laptop in standby despite the standby button bound to do nothing in xfce-power-manager. If I take out acpid, does that mean laptop-mode will no longer detect acpi events such as connecting/disconnecting AC power and thus not change modes when its plugged in?
Another problem I've had after installing xfce4-power-manager is that when I use the brightness hotkeys the backlight gets stuck and starts flashing, locking up the system until I force shutdown. However, I can use the brightness plugin without trouble at all. What's causing the power manager to screw up setting the brightness since it clearly seems to work otherwise.

It is easier to close this one and move the other thread over here. Just continue there.
BTW better use the Report button when you want to have a thread of yours moved to another forum. That way it is guaranteed a mod will see this in time. And you never need to cross post.

NOKIA N79 BACKLIGHT PROBLEM

I HAVE A PROBLEM WITH MY NOKIA N79, WHEN I PLAY GAME AND BRING THE SCREEN IN STANDBY MODE BY PUTTING THE GAME IN BACKGRUNG AFTERSOME WHILE MY MOBILE'S BACKLIGHT SCREEN DOESNT WORK PROPERLY, EVEN IF I OPEN KEYPAD LOCK & PRESSES BUTTONS ITS LIGHT DOESN'T GET STARTED FOR SOMETIME, DO ANYBODY HAVE SOLUTION???

It seems that this isn't done on S60 Nokias any more, just S40 ones.
Message Edited by sockatume on 05-Aug-2009 08:45 AM
Help I'm trapped in a sig factory.

Backlight problem

i have this weird problem with my new ipod touch which i bought last thursday.
the backlight keeps randomly turning off when im using apps and sometimes it just randomly turns off on the homescreen. i have tried resetting its settings and restoring it, but the problem still occurs.
is there any way of fixing it?

is there any way of fixing it?
Take it back for an exchange now.

24" iMac backlight problem

I've had my 24" imac for about 6 months. This morning when I switched it on the lower half of the backlight has not switched on (so the screen is dim at the bottom, and bright at the top).
If I put the computer to 'sleep', when I wake it, the bottom half of the backlight flashes on to normal brightness for about 3 seconds then switches off again.
..I'm assuming this can only be a hardware issue?!

Sounds like a hardware problem. However, you can try this procedure to reset the SMC (which controls power management in the iMac)
http://docs.info.apple.com/article.html?artnum=303446
If it's only six-months old, it's still covered by warranty. If there's an Apple Store nearby, take it in. You can make a reservation for the Genius Bar at
http://www.apple.com/retail/

Lenovo T61 Backlight Problem !

Hi, so i bought a notebook Lenovo T61 last year in september. The model is 6459CTO with a 15.4 WSXGA screen. This is how it shows on the packing list.
15.4 WSXGA- TFT
So 25 days after warranty expired the notebook screen died. How **bleep**ty is that ? When i turn on the notebook, i only see very dim thinkpad on the screen and then it gets completely dark. After researching, I am quite sure its either the inverter or the backlight. Since i am a college student i cant really afford getting it fixed so i have to do it myself.
Can anyone help me find the backlight ? I tried finding the backlight online but no success. Also it would be great if someone knows how to open up the notebook LCD and replace the backlight. I have all the required tools including the solder. Please help me out !!! Thanks

Welcome to the forum!
Before you start pulling that T61 apart, let's review a couple of things:
a) Does it have Intel or nVidia graphics?
b) Does it display anything on external monitor?
c) Was the LCD reddish/pinkish on initial boot before this last episode?
While it may very well be the inverter or backlight (more likely) you may also be looking at a motherboard problem. That's why I'm asking whether the machine displays on external monitor.
Replacing a backlight is NOT a job for a novice, take it from someone who's done it in the past but chooses to have it done by another party nowadays...
Good luck and let us know.
Cheers,
George
In daily use: R60F, R500F, T61, T410
Collecting dust: T60
Enjoying retirement: A31p, T42p,
Non-ThinkPads: Panasonic CF-31 & CF-52, HP 8760W
Starting Thursday, 08/14/2014 I'll be away from the forums until further notice. Please do NOT send private messages since I won't be able to read them. Thank you.

Backlight problem with software updat 1.1 for neno

the new 1.1 software update of 'iPod Updater 2006-01-10' for neno stuffs up the backlight. if i leave the light in always off or always on and try to use (press and hold) menu button to manually switch on and off the back light DOES NOT WORK any more....
apple pls fix it asap...

heres wats new with 1.1-
1. holding menu will take you to the main menu instead of activating or deactivating the backlight
2. lyrics and album art staying on screen and not disappearing after 10 seconds
3. Apple Radio Remote support
4. Line-out problem, occasionally when going from headphones to line-out, there would be no sound.
5. The 'Alarm' feature has been overhauled, easier to set the time, and a little bell icon is displayed next to the 'Alarm' menu item when it is set.
6. 'Screen-lock' has also been changed, slightly different interface, the numbers are in sunken boxes as opposed to the red glow. And a new warning is given telling you to hook your Nano up to your comp if you forget your code.
7. There was a problem with turning off, if you scrolled back or forward through a playlist/album, back to the main menu, sometimes it would not turn off.
8. The song title is in bold above the lyrics when you go to the lyrics screen
9. itunes opens almost instantly (within a second or 2) with the ipod showing. Before, this used to take 5-10 seconds, maybe more.
10. Reduced lag, before, when scrolling and clicking quickly through menus and songs, had some 'slow down', this is gone now.
11. Before the update I noticed a lag when I would skip songs, the next song would come on but the tags would have a slight lag on them and that has been fixed as well.
12. More accurate battery meter. Doesn't go down too quickly as it used too. One person said that it actually increases battery life after a testing.
13. When using the Universal dock with remote the backlight will come on after you change the volume, before the backlight remained off.
Nano 4GB black,Moto RAZR V3 black, PSP, all kinds of cases for nano,radio/remote Windows XP <img src="http://i36.photobucket.com/albums/e13/superman5656/s.gif"align="right"</span>

Screen or backlight problem - washed-out colors, fuzzy white overlay

I've had my iPod for quite a long time now and have been living with this problem for at least a year. Some times, when I start using the iPod, the screen gets all washed-out with a fuzzy white overlay. It looks fine when the backlight turns off from not touching it, so I think the problem might be with the backlight. If I completely recharge the iPod, letting it fully turn off, the screen will usually come back to clarity. Also, if I leave it in the refrigerator for a while, that too will often solve the problem.
The fuzziness usually happens after having the iPod go to sleep - either from me pressing and holding the pause button, or from the songs being stopped or paused and the iPod not being used for a time. I don't recall, but it might also happen when playing if it's been playing for a fair time and the backlight has been off. It seems like, if the iPod goes into sleep mode when it is warm - room temperature or greater seems to do it - it's fuzzy the next time I start using it. Having it fix itself from being outside in the cold, in the refrigerator or in the basement seems to suggest it as being a heat-related problem.
So, what part do you think is causing this problem? A light? The screen? A chip or connection somewhere?
Are there others out there with this problem? It's rather upsetting, as I like to watch videos and play games on it but I can't rely on it having a clear screen.

All the things that my iPod has been through (in no particular order):
- Age; I've had the iPod pretty much since they came out
- Manufacturing problem or Firmware update bugs; I've survived a multitude of problems in the past (seemingly bricked being stuck in a loop of trying to turn on, the videos don't play video or sound problem, the not-recognised-by-iTunes problem, not being recognised by the iPod updater)
- Slight bending and pressure from by carrying it in my pants pockets (front and back) on occasion over the years
- Damage from being dropped on occasion
- Possible damage from being used in a hot, smokey environment for months
- Being exposed to heat or static from fuzzy jacket pockets
- Being exposed to heat from my waterbed
- Being exposed to cold over some very cold winter days
- Pressure and scratching from a plastic shell I bought to protect it, which turned out to be a very bad idea as it caused many scratches to the screen and may have been too tight as the lcd was showing distortion with it on
- Probably got some water on it a few times
Thinking back to when I first had this problem, the causes may be one of:
- Possible damage from being used in a hot, smokey environment for months
- Being exposed to heat or static from fuzzy jacket pockets
- Being exposed to cold over some very cold winter days
- Probably got some water on it a few times
- Age; I've had the iPod pretty much since they came out

N85 keypad backlight problem

I find an annoying problem with the backlight, if I power on the phone in complete darkness there is no backlight on the keypad, so I couldn't key in my PIN correctly and will lockup the SIM !!

Just try to reset the factory settings to default.
A soft reset:*#7780#.
If it still occurs, then visit a nokia care:
Care points:
UK
http://www.nokia.co.uk/A4228006
Europe:
http://europe.nokia.com/A4388379
Elsewhere:
http://www.nokia.com and select your country.

N80 keypad backlight problem

Hi
I've got problem with my Nokia N80
The backlight of the "down" keypads (buttons: 1234567890*#) doesn't works. I am not the first owner of the phone, and I am not sure what is the problem, but I'm sure that the phone never felt down in water or something else.
There is backlight only in two cases:
-when the phone get start, there is backlight in these keypads, until the Nokia ring and the logo with the two hands shows - then the backlight disappear;
-when the phone is in SILENT mode without neither vibration, nor rings; if there is an incoming call and if the phone is "opened" - all backlights is blinking (including the "down" keypads).
Any advice? Maybe the light senzor is broken, or maybe softwear bug (when i bought it, was with soft. ver.: 3.0617.0.6, then I update it to 5.0719.0.2, but the problem doesnt fix).
Thanks in advance.

Just try to reset the factory settings to default.
A soft reset:*#7780#.
If it still occurs, then visit a nokia care:
Care points:
UK
http://www.nokia.co.uk/A4228006
Europe:
http://europe.nokia.com/A4388379
Elsewhere:
http://www.nokia.com and select your country.

Long phone call, backlight problem.

Well sometimes i have long phone calls to deal with, say for around 3-4 hours. When i want to end the phone call i obviously move the phone away from my ear and press the "End Call" button.
Problem is, that the backlight doesnt come on. I dont know why this is, its happened a few times and ive had to press the unlock and home button together for it to restart itself or whatever, but having to do it everytime is really annoying!
Anyone got any suggestions? Tweak the settings or anything?
Thanks for any replies!

If you're using a case, take it off. A lot of people re-use cases meant for the Original iPhone and the case blocks the proximity sensors.

Keyboard backlight problem in windows 7.

i am using macbook pro (13.3 inch) about three months. I am using windows 7 in my mac. Everything was ok but recentlly keyboard backlight and extra features of function keys is not working in windows 7. And i am also facing another problem. I have to set up single and double tap option from bootcamp control panel each time i boot in windows. I am using Mac OS X 10.6.7.
What is the solution? Please help if u know something about this.

Boot Camp forum.

Dial interface color temperature change and automatic backlight problem

hi，
I got the new iphone6 today, 16G, IOS8.1.1, when I use, I find some problems as below:
1) when you use dial , you will see the color temperature is changed, form redness to blueness.
2) If u open the automatic backlight function, when u go to more brighter environment, the brightness change to higher, but then u go to darker environment, the brightness is not changed or changed very slowly.
dose anybody also have these problems?who can explain the root cause?

Do you have a protective film attached to the screen? If yes, make sure it does not cover the ambient light sensor on top of the screen. Same if you are using a case around the device.

T420: Backlighting problem

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