Lenovo ThinkPad L R/SL :: L440 / Win 7 64bit And TFT - Black Screen While Working For Few Second
Nov 24, 2014
Customer has three L440 with Docking station PRO and Samsung 22" S22C45 on DVI
* W7 64BIT Sp1 Lenovo version not VL
* Latest BIOS
* Latest GFX Driver
* All Windows WSUS Updates (Standard Image from lenovo with all Hotfixes)
* Power Options set to Performance (lenovo Power manager deinstalled)
* Office 2010 SP2, PDF24, APPV client 4.6+
* Dameware 6.X Agent
problem:
Laptop is in docking station with external 22" Samsung DVI and working in Winword, IE or others. Suddenly screen from Samsung turns black (laptop TFT from people who use dual stays on). After 1-10 seconds the samsung screen comes back. We fiest thought this was some RDP issue with other users connecting to the device. (Not the case)
NO > BIOS and GFX is latest and MADE it worser with updating to the latest (happens more often).
NO > MHz change from 59/60 or slighty modify did not solve
NO > It's not a screensaver problem
NO > All three Samsung are from diffrent shippments and even Distributors
NO > All three L440 are from different time periods 2-3 Months split
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May 12, 2014
I have the Lenovo L440 (20AT002YGE) with the integrated Intel Graphics.
I have turned off the automatic dimming of the screen brightnes in the windows energy settings and also turned off the energy saver settings in the Intel driver but the screen keeps beeing dimmed when the background is black or dark. This is very annoying when you work outdoor and the sun keeps shining on your display and than it dimms the brightness.
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Nov 5, 2014
I have a Thinkpad L440 with 4GB of RAM.
1. Is it OK to add 8GB (so I will have 12GB in total) or it would be better to add 4GB in order to have two similar SODIMMs?
2. Are there any known incompatibilities for specific brands? I found two SODIMMs from Kingston (part numbers KVR16S11/8 and KVR16LS11/8) and one from Crucial (part number CT102464BF160B). All are clocked at 1600MHz.
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Sep 29, 2010
There are a few configurations of L440 laptops with Nvidia GT 720M grafic cards and Optimus (e. g. 20ASS01G00). Is it possible to change the used graphic system in the BIOS (Intel only/NVidia only/Optimus)? And which card is hardwired to the external ports (VGA, mDP)?
(Do this differ from the T440p or the Edge Series, E540?)
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Sep 9, 2014
I have L440 with 64-bit Win7. Earlier experienced major WiFi connection problems, which were fixed with BIOS and WiFi card driver update.
Briefly after that Wireless Radios Master Control no longer lists Mobile Broadband, it only shows 802.11 Wireless/Wimax and Bluetooth.
Windows Network Connections lists "Mobile Broadband Connection" as "Not connected, N5321 gw Mobile Broadband Driver. Diagnosing this connection suggests to "Turn on mobile broadband capability", which I cannot do as it is not listed in the Wireless Radios Master Control.
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Mar 9, 2013
I have a brand new W540 with Windows 8.1 running. Some Fn-Keys are working, for example Fn+F2 for the volume. But I have some keys which are not working: Fn+F5 or Fn+F6 should change the LCD brightness.
Why these keys are not working? All updates are applied (Lenovo and Windows)...
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Apr 7, 2014
I have a Lenovo L440 laptop with a think pad pro dock. The HDD is encrypted with TrueCrypt and needs a password before windows will boot. The laptop will not display out to the monitor attached to the dock before windows loads. I have changed the bios setting Config > Display > Boot Display Device, as well as all the other display options, but it does not make a difference. I have tried with a VGA cable and a DVI cable and neither works. I have tried with 2 different L440s and 2 docking stations with the same problem occuring on both. I have successfully used a Lenovo L540 laptop with the same model of docking station. I have also updated to the most current bios version.
I'm wondering if I'm missing something or if the L440 model simply does not support this function?
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Jan 3, 2015
I bought Lenovo L440 few days ago.
I have problem with wifi connection. Wifi works perfect with other devices: phones, tablets, laptops. When I connect to wifi with L440, wifi works 5-30 min. and then crash. L440 kills wifi network. All devices can't connect to wifi until I restart router.
I have read about this problem, but in task manager I can't find "discovery.exe" or LenovoEMC Storage Connector in Contral Panel.
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Mar 1, 2014
When I pause playback of an .mp3, there's permanent white noise coming from the internal speakers.
Stopping the playback stops the white noise after approximately 4 seconds. I never had this issue with any laptop / soundcard. Can this be fixed?
I have the latest BIOS and drivers installed. Headphones are fine (no white noise).
Maybe the inbuilt L440 soundcard has a problem. I had to return my first L440 because there was a loud plop when starting playback and the left speaker was way quieter than the right one.
In the German part of this forum people are reporting problems realted to the internal speaker (cracking sound, white noise).
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Apr 26, 2013
My R51 was working perfectly and has been maintained over the 8 years it has been with me. I wanted to upgrade my RAM and downloaded the BIOS update and chipset drivers updates.
After powering down I pulled the old 256MB RAM sets from under the keyboard and bottom of machine. I then inserted the single 2GB RAM into the slot under the keyboard and reassembled it.
Black screen/ no boot
Took out the 2GB replaced the 256MB sets and it worked fine for a few hours as I searched out reasons why the 2GB would not work. 'Suddenly the screen goes black and the system shut down.
It will power up (battery light/ status light green) but screen is black and it will not boot. Fan is running and battery charges. I tried hitting F12 and F8 but nothing.
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Feb 5, 2015
I followed all steps here----> [URL] .... and still getting black screen after all. What should i do next...
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Dec 7, 2012
Btw my mobo,cpu,memory i believe were all replaced last time i took it in with this issue... Still getting it consistently:
Random Black Screens and Random Sleeping: [URL] ...
Black Screen: [URL] ...
I thought before maybe its Bluetooth related as sometimes when screen would turn black and then come back, I would get a 'Bluetooth Device Not Discoverable'. So turned off Bluetooth in the BIOS, but still having display/sleep issues.
I removed hte Lenovo Power Manager/PM Driver, and turned off sleeping in the Windows power settings (in every setting including if Low Battery Action).
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Mar 11, 2014
I've got a X230 with an IPS screen since 1,5 years, and I currently have some issues with it.
Sometimes, the bottom left of the screen blink and black bars appears, along with some square brightness shapes.
I'm pretty bad to description, so here an album of the problem : [URL] ..... (it's more clear if you zoom).
Link to picture
This is a detail of the bottom left :
Link to picture
Again, this appear sometimes only, and a knock in the screen resolve the problem, but it's worrying.
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Dec 26, 2013
Yesterday i have taken new laptop model - T430. It flashes a black screen for 5 secn when i plugins in/out.
I have checked refresh rate. It's set to 50.
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Jun 21, 2013
I have a ThinkPad X230 Tablet. I tried system restore and safe mode, but none of it works.
After windows loads with the glowing animation, the login screen does not appear. I cannot open a task manager. I don't know if it's a problem with explorer.exe or what.
The explorer.exe crashed when I tried to connect to an external hard drive, and I tried to get task manager to open, but it wouldn't open.
That's when I tried to restart computer, and login screen would not appear. All I have is a black screen with cursor.
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Nov 4, 2014
It's been a yeah that i work on this X1 Carbon laptop and no default. I got a windows update yesterday, i did it and my computer powered off naturally. This morning, i cant start it, It boot well, Lenovo sign appear but nothing after. only black screen with blinking underscore.
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Oct 20, 2013
I have an S440. I've had it for one week. Two days ago I downloaded the Windows 8.1 update from the store. Since then, when I start up the computer, it doesn't even taken me to the 'sign in' screen. There's just a black screen. When I move the cursor, it briefly appears, flickers, then disappears again.
I understand this is an issue with the graphics drivers. So I ran Windows in safemode and disabled Intel R HD Graphics family and AMD Radeon HD 8600 series graphics drivers.
This, unfortunately, hasn't fixed the problem. It still boots to a black screen with an occasionally flickering cursor. I'm currently running in safemode.
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Jul 11, 2014
Some days ago, i bought thinkpad x40 and upgrade OS to win 8. But, touch screen isn't working.
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Feb 23, 2013
I'm running a Windows 8 Pro 64bit on my Thinkpad X200s. What is the absolute more ram usable and recognized by the laptop?
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Dec 28, 2013
I bought a T510 few days ago and was surprised to see this machine has ridiculously low volume. I have tried everything including the tweaks in Smart audio and removing audio limiter but still the volume is very low. On my dell 1525, I never go past 40% volume on my headphones but on T51o, I am using 90-100% volume to watch videos on live streaming websites.
Is there any solution to boost the volume on T510? My system is with windows 7 ultimate (64-bit) and audio device is Conexant 20585.
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Jan 11, 2013
So this is about the only issue I have with Windows8 on my laptop, I've tried various audio drivers from OEM provided
to drivers directly from the Realtek site and I can't seem to remedy the issue....
Only during charging of my laptop or when the laptop is on battery does the jittery/distorted audio playback occur. Happens during Flash playback or local media playback using say VLC, sometimes the distortion can Freeze or lock up the system.....
I've tried Audio Drivers, Video and my BIOS is the latest. This playback issue did not occur under Windows7 when I had it installed....
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Dec 7, 2014
I have a HP Pavilion g7-2325sb running Windows 7 64 bit. but the buttons for adjusting screen brightness don't work.The buttons for audio adjustment do work without pusshing the fn button.In bios "action keys mode" is enabled.I think it's some software missing but can't find the software, neither can "HP support assistant".
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Nov 17, 2010
I bought my lenovo G460 with nvidia M310 (with hdmi) this year and have not been able to get the hdmi port to work.
I have two lcd displays one in our lab and another one at home (LG 2361V-PF) which have hdmi connections in the back.
In the beginning I was able to get my notebook to work on the display in our office. However, now both displays (work+home) are not working.
I have tried to reinstall latest nvidia drivers as of 2010-11-02 (ver. 8.16.11.8990) from lenovo, completely restore Operating system and tried different hdmi cables.
I have even tried to use original drivers and also downgrade that to a lower version all with no luck.
I have even taken my LG LCD display to the LG After Service Warranty office and have found no issues wrong with the Monitor itself.
I am sure I have taken all the trouble-shooting methods into consideration so a simple question is... Is the hdmi port defective?
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Nov 15, 2014
I tried plugging several devices into a USB 3.0 port on my z510 this morning to no avail. The USB 2.0 port is working(I have a mouse plugged into it and it works fine) but the USB 3 ports will not work at all. I tried looking at device manager; it says everything is working properly. Power management doesn't turn any of the ports off.
It was working fine 2 days ago. Is it possible to turn the ports off? Because nothing is being recognized.
I looked for drivers on Lenovo's site; no USB drivers for windows 8.1 at ALL. What do I do?
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Mar 31, 2013
I have a T430s computer model 2352CTO, running Windows 8.1, 64-bit version. Prior to upgrade from Windows 8.0 all drivers were updated. The USB 3 ports worked correctly, in particular running an external 1gb hard drive. After update to 8.1, the USB 3 ports still work, but only for about 30 seconds then the hard drive shuts down. The power light is still lit on the hard drive, but it no longer shows in windows explorer.
In device manager, I went to Universal Serial Bus Controllers -> USB Root Hub ->Properties->(under General it says "This device is working properly)->Power Management->Unchecked the box for "Allow the computer to turn off this device to save power". Unfortunately this does not seem to stop problem.
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Jun 27, 2013
30 minutes ago, it was working perfectly with no issue. I turned it off and after 1 hour I tried to turned on by pressing the power button but it is not working. No lambs no sounds nothing. It is just like a rock.
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Mar 15, 2013
I've had the W530 for two years and there is an issue when turning on the laptop. I haven't contact Lenovo's warranty yet.
When I press the power button, frequently it shows the Thinkpad white logo against black background and won't load. Windows at all. It just stuck there.
I have already restore the system but the problem is still there.
Oddly, when it does work (which is rare), the "to interrupt normal startup, press enter" appears. Everytime it works, that phrase would appears.
The only components I have connected to this laptop are ethernet cable for internet, USB hub, and external drive hooked up through PC slot on the side.
Laptop Spec:
Windows 7 Professional with latest update
Intel Core i7 3720QM 2.6HGHZ
Bios 2.7
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Jul 6, 2014
I have hp g61 for a while, i have been maintaining really good till recent my screen went BLACK.. it was acting funny before as it stays ON after i turn of the laptop... and now it is all back cant see nothing ... the laptop works fine when i connect to external monitor..
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Apr 7, 2013
I bought my laptop just under 2 years ago. Over the past few weeks, when I switch it on, it beeps 8 times and the screen is black. There is also no battery left (the light on the charger block comes on, but the charging light on the laptop does not).
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Jan 14, 2009
it happened two times today, the screen went totally black, the fans stop working and the "sleep lights" turned on and off. Soon after the disc drive made the sound that id usually makes when turning the computer on.
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