Dell :: M4400 ALS Not Functioning At All Under Windows 7 (but Other Backlight Control Works Fine)
Sep 29, 2009
Has anyone had an issue where the ALS suddenly stops working under Windows 7? I've checked BIOS settings, tried seemingly every combination of driver uninstalls/reinstalls, confirmed that both the Dell and Microsoft ambient light sensor services are enabled and running (and tried disabling, one, the other, and both) and have not had any luck. Unlike some other posts I found on here with the same-body Lattitude models, I can control the backlight manually with both the keyboard and software - it is only the ambient sensor that does not work.
I am running BIOS A15, and Windows 7 x64 RTM.
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Nov 30, 2012
my studio 1747 (not in warranty) (i7 win7),has stopped booting anymore it was working fine till last week ( occasionally my screen does flick in last coupon of month), So when I do turn my system on all upper volumn light flashes from left to right and then right to left and then system turn off itself, during that period screen show no display.
connecting external monitor (TV via hdmi) does work and system boots fine show display on external monitor but no display on system LCD. Something display flicks on external montor also, it happens when my laptop LCD tries to display something (i.e. sometime laptop LCD flicks and sometime it display for few seconds and then go back to Black screen). Also when connect external monitor my mouse pad stops work and sometime works when I connect usb mouse, but when LCD screen start display something, mouse pad also starts work.I tried all stuff, whatever I could find on internet as below
1) Taking battery off and press power button for 1 min.
2) Hold 'D' key and then press power button LCD sometime show some color and then goes back to black.
3) Removed battery and CMOS battery to total drain of charges.
4) Removed keyboard panel and checked LCD display cable and make sure its not loose.
To me it seems like motherboard, graphic card are fine as system is working on external monitor, LCD screen also looks fine as sometime is display and not greying out (its either Black-out or display). As I have also checked cable is properly attached with motherboard, so it can't be loose connection. Don't understand why LCD works sometime.
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Mar 30, 2014
I have a HP pavilion 15 laptop, 64-bit, windows8.1, i7, intel hd graphics 4400, Geforce gt 740m. The problem is that while watching online video(youtube) through the web browsers, first of all the video playing smoothly, but after a few seconds, the video stops a while, and then continue play but the video is freeze while the audio works fine, then it completely stops. I have smooth Internet connectivity, i have checked all the flash player on browsers, drivers are updated, except for Intel HD Graphics, current version is 10.18.10.3304 , while the newest version is 15.33.18.64.3496 (10.18.10.3496) 140mb, after downloaded and run, it says that my OS does not match.
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Sep 17, 2013
So, I have B590 Lenovo Notebook with Windows 8 and the Wi-Fi doesn't work well.
When I try connect at home, my Wi-fi works fine. Not problem. But when I try another one - e.g. In School or somewhere in the city, the others wi-fis don't work. Windows 8 tell me something like "It's not possible to connect" .....
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Jan 12, 2009
I have a Compaq 3000 Laptop, it's almost 2.4 Years old now, over the period of time I dint faced any issues with my Machine.it all started yesterday.
I was watching a movie on my Laptop yesterday, after sometime the screen froze up but the movie was playing as I was able to hear whats going in the movie.
Later I tried restarting the machine, what i get is the machine boots up properly, but the screen doesnt display anything thing, it shows up a blank white screen, sometime when the windows XP loading picture comes up the screen shows light distorted colors but again goes white blank.
I did approached a local vendor for that but he says that we need to replace on the motherboard, I was not much convinced over his explanation over the issue.
I would like to know your views on what might be the problem with my Machine.
I am going to try over connecting an external monitor and see if LCD is the problem, but I would like to know more what all possible options are there which might be affecting my machine and how much would it cost me in the worst possible case.
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Mar 4, 2014
When I connect ethernet cable to my Envy 15 j150us laptop the upper one of two led indicators which is link indicator never lights up, however second led that is activity indicator is blinking and internet connection works fine.
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Jan 31, 2015
Beats Audio will not work on my new HP Laptop. The beats audio setting in control panel is just not functioning.
I have download IDT high definition Audio drivers sp63932.exe & sp63555.exe from hp support site but neither works.
Laptop- HP Pavilion 15-p117na TouchSmart Laptop (Energy Star).
Operating system - Windows 8.1 (64-bit).
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Jan 28, 2010
I am having some strange problems with the backlight on my dv9700...I started a thread about this maybe 2 months ago but the backlight for whatever reason started working again and I didn't have too many issues with it until recently. Lately the backlight has only been working when it is plugged in...If I unplug it but leave the lid open it still works but as soon as I close the lid and open it again its out until I plug it back in and open and close the lid. Now I can't get the backlight to work at all except it lights up for 2 seconds or so upon closing and opening the lid. I removed the display bezel to access the display inverter and check for any loose or damaged connectors but they all appear to be fine...unplugging and plugging the display panel cable connector back in also causes the backlight to work for 2 seconds and then go out again. Besides the backlight issue the laptop seems to be working perfectly fine...can anyone help me figure this out? I should mention that I upgraded this laptop to Windows 7 right away when it was released.
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Mar 8, 2010
I noticed last week that the back light option on my keyboard no longer functions.I know the Fn key works on the keyboard as I can perform other Fn+ tasks and I know that the right arrow key (which is the same combo key that controls back-lighting) also functions on it's own.
Aside from normal Windows 7 updates, the only changes to my laptop recently has been flashing to the A07 bios and the new power supply mailed out by Dell.Am I missing a software option somewhere that defaults my back-lighting to off? Or is it a mistake (or intention) of the A07 bios to disable this feature given the recent power supply throttle issues with this model laptop.
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Oct 21, 2009
I'm working on a Dell E6400 that has a peculiar problem. When the laptop is off, and connected to its Dell docking station, and I try to boot, I get "NTLDR is missing" errors and it will not boot.
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Jun 17, 2009
I happen to have two M4400's on me, both have the RGB-LED. Figured I'd take some pictures to compare the bleed on both backlight's.
The one on the left was delivered this week and the one on the right was delivered two months ago.
Curious, other CCFL or RGB-LED M4400 owners, do you find your bleed patterns similar?
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May 6, 2009
i just got my new M4400 and am happy so far APART that my RGB-LED screens colors seems to be a little washed out compared to the one i had before (another M4400 with RGB-LED).
In addition to that the screen bleeds so that black is almost completley grey O.o ... is this anywhere near reasonable or normal?
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Sep 30, 2009
I've got brand new Latitude E4300 and I decided to install Win7 64bit in order not to upgrade after I install all my software onto Vista. But I cannot get the LCD backlight control get to work.
In BIOS the settings work well, but in Win7 it does not. e.g. when I set in the BIOS half backlight, it works until I try to change it in Windows - it suddenly jumps to full backlight (I suppose),
but the Dell Controll Point dialog shows some 1/3 or similar. Then I'm able to change it +1 step, but it doesnt make any difference, even turning on and off the ambient light sensor doesnt make difference.
I tred to install several drivers from dell.com, but the support for Win7 64bit isnt very good. So I took some drivers from Vista 64b, and Vista 32b, but it made no difference.
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Jan 22, 2015
Taskbar icon for Gigabit Network Connection shows "No Internet Access". But Internet access works fine. But, since the driver thinks there is no access, I have to disable WiFi to force the laptop to use the wired LAN. Device Manager says everyhting works fine. Driver update says I have the latest driver (12.10.29.0 dated 2014-05-02). My T430 with the same adapter works fine. What do I do? Only difference between T530 and T430 is the T530 is in a dock.
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May 19, 2010
the keyboard backlight goes off after about 30 seconds of non-use of the keys. The trackpad movement doesn't keep it lit.
i can re-light by touching any key, but this presents two issues:
1.) the first keystroke is entered. (i guess i can use the shift key)
2.) more important, the screen brightness seems to react to ambient light, so the keyboard's light ends up making the screen pulsate.
I couldn't find a specific reference, although hard to believe. But then again, the humongous threads are hard to search effectively.
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Jun 13, 2009
Just lookin' over the spec's on the new iphone and I noticed that the headphones now support volume control. I didn't see this fact listed before anywhere else or during the keynote... Its about time apple! The only major downside is that they are not enabling the feature on the 3G iphone. [url]
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Apr 8, 2010
1. How do I control the duration for which the backlight keyboard lights are on.
2. The ambient light detector keeps dimming and brightening my screen when in a complete dark room. How to fix this?
3. How to turn on or off the green power light button?
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Feb 17, 2013
I have Inspiron 15R 5520 running windows 7 .,. In this model i have 3 hotkeys one for settings the 2nd for multimedia the 3rd is for apps i guess only the setting buttons is working what should i do ?
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Feb 16, 2015
I'm using aspire E1-510. I run two windows os on my system; win 8.1 and win 7. When I'm running win 7, my USB ports dont work. That's, if I plug my flash drive or any external device, it doesn't work. But when I run win 8.1, they all work well. What do I do so that my USB ports can as well work on win 7?
Secondly, is it safe to install Norton Internet Security on both OS?
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Nov 15, 2012
I'm experiencing problems with a Lenovo Laptop. I cannot log into Windows because the keyboard is not functioning as normal. The 'H' button is operating as a backspace for example and because I cannot see what I'm typing in the password bar, I don't know which keys are what. Only some keys produce characters and when typing other keys the system just beeps. I had this problem yesterday and I fixed it by holding the FN button and F4 or F7, I think it was F7 but now the same combination isn't working.
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Sep 25, 2014
My wife just updated her G580 with the Windows 8.1 update. Afterwards, the keyboard does not function - no keys respond when trying to sign into the computer, the touch pad does not work (USB mouse does), even the Onekey Rescue System button does not work. The only thing that seems to work is the power button.
I restarted the computer and held down the F2 key and was able to get into the Setup Utility where the keys did function (arrow keys, F1, F2, esc, enter). I didn't see anything obvious to me that might work. Exiting the utility and back at the sign on screen the keys don't function again.
what might be the cause or a way to recover the keyboard?
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Nov 25, 2012
i upgraded from Windows 7 Home premium to Windows 8 pro . Eversince, my AMD radeon HD 7400M series graphic card is not functioning. Further , bluetooth is also not functioning .
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Feb 15, 2009
new screen/inverter/ backlight installed. NEW screen still black, but visible with flashlight. Went ahead and got ANOTHER inverter off eBay and tried that - screen still black. Haven't ever replaced a backlight, and the operation looks delicate (and expensive to HAVE done) ...
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Nov 26, 2013
I have a HP 6t-1200 CTO Ultrabook with the Radeon HD 8750M and Intel 4000 switchable graphics.
Problem: When I am operating with Windows 8 they function normally, but upon updating to Windows 8.1 the AMD drivers fail to be able to initiate and D3D.
1. Most current driver is dated 2013-01-14
2. Generic drivers do not recognize the hardware
3. Drivers for other HD 8xxx series based HP laptops do not resolve the problem
Current workaround: Open the Catalyst Control Center and go to switchable graphics application settings under the power tab. Switch anything that uses DirectX to run in power saving mode, this will run those applications using the intel 4000 graphics which has a more current driver that works with Windows 8.1.
Solution: For now I believe that the only solution is to wait for HP and Microsoft to work together on creating a newer driver. Once that newer driver is released it should resolve the problem. The other solution is to permanently stick to Windows 8 and not update to Windows 8.1. This is a bit more difficult though since Microsoft pushes 8.1 very aggressively. There might be a way to make the notifications and automatic attempts to update stop, but I have not looked into that solution.
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Dec 11, 2009
I recently upgraded my M1330 from Vista Home Premium to Windows 7 Professional, and I've lost the ability to use both audio outputs at the same time.
For example, on the front of my laptop, there are two audio outputs, so that two people can listen to something at the same time.
However, after going to Windows 7, I've lost that ability. Both of the outputs work, but you cannot use 2 headphones simultaneously.
I used the SigmaTelHD Vista drivers and no luck.
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Oct 24, 2013
After upgrading to Windows 8.1, my XPS 13 keyboard backlight remains on 100% of the time. i can turn it off with the function key on the keyboard, but after a restart the problem repeats. Also, I have not found away to get it to automatically turn off after the keyboard has not been touched for some time (which is how the backlight is supposed to work).
Is there any fix for this? I've already installed all of the Windows 8.1 drivers from your website.
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Jan 13, 2015
I have a Studio 1558 laptop, originally with Windows 7 which I upgraded to Windows 8.1 Pro. I have just installed a larger HD (1TB) to replace the 500GB which I thought might have been on its way out as it occasionally started clicking. I have also taken the opportunity for a clean install of Windows 8.1 Pro. But the Device Manager does not show any Bluetooth devices even though the Bluetooth mouse works! However I cannot find any links in Devices & Printers to allow me to change the mouse wheel action or the Synaptics touch pad action.
Going back to the 500GB HD gives me all this functionality so the hardware is all ok. The BIOS settings still have Bluetooth enabled. I have updated Windows updates, and used Slimdrivers to update all the drivers.
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May 2, 2009
On my Vaio TZ150N, after installing Winows 7, everything works, except the built-in WebCam. I have tried re-installing the drivers from both Sony and Ricoh, but no use so far.
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Jun 17, 2009
i would like to buy a macbook 13" with intel core 2 duo processor, i would like to know, how works windows xp on macbook? by bootcamp or virtual box, is it work fast? i would like to play games on xp or use some audio software, does it work simillar as a pc? or a little slow?
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Oct 7, 2009
I may be over-reacting here, but I just realized that I can access the Internet from my VAIO FW490 via Bluetooth tethering using my LG Vu.
No special tools or software needed, except the Broadcom Bluetooth Driver from Sony eSupport. It's really quite handy if you plan to take your laptop on the road.
Here is a simple guide.
http://fw490.blogspot.com/2009/10/ev...bluetooth.html
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