Lenovo T400 / T500 :: Thin Light Gray Horizontal Line Across Bottom Of Screen
Apr 13, 2010
There is a very thin, almost transparent, horizontal line accross the bottom of the screen of T400. Product is 7417CTO, Windows Vista Home Basic OS.
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Dec 3, 2014
I have a M17x R3 laptop since a few years. A few weeks ago I sent it to the shop to have a SSD installed and have Win7 reinstalled (Windows Explorer kept crashing all the time and I wasnt able to format for some reason). When it got back from the shop, I realized a problem that was not there before.
There are 2 horizontal lines, one at the top and one at the bottom of my screen that keep flickering. They dont appear when I'm on the desktop or playing games, only when I have a program running (iTunes, Steam, DivX, etc) in fullscreen.
Here are my specs
Alienware M17X R3
Windows 7 64 bit
AMD Radeon HD 6870M (I also have Intel(R) HD Graphics 3000 in my display drivers. Just noticed that the version for both is 9.3.0)
6GB RAM
Dont know if it has anything to do with this, but when I got my laptop back I tried to install Cataclyst Control Center and it messed up my graphics bad, I could only run 640x480 and the only way to fix this was to uninstall CCC.
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Aug 17, 2014
I have a T440s and have an issue with the camera. It seems to turn on (little green light comes on) when I access the Windows 8 camera app or any other app (like skype), but I do not see anything out of the camera except for a gray screen with a camera icon that has a bar through it. It looks like the camera needs to be activated somewhere but where to look. I have checked the driver and it seems to be fine (no yellow warning icon), I even unistalled and reinstalled the latest camera driver from the support website but that does not change anything.
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Mar 15, 2014
When I move my finger across the touchscreen on my brand new T440s Windows 8 machine, a skinny dark line about one inch long follows my finger--whereever I move it.
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Apr 26, 2013
My laptop is having problem actually when i start my laptop different colored horizontal line start coming on screen and after some time whole screen becomes white.. what is the reason behind it and what is the solution of it...??
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May 4, 2014
I am using Lenovo T500 laptop for last 2 years. yesterday suddenly its battery stop charging and a red light of battery start continuously blinking. i have read many forum for charging solution and found one solution, i press the power button for 30 sec and then insert battery and charger cable. With this trick battery start charging but after 2 hours battery again stop charging. Till now battery is not charging......
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Apr 13, 2009
I noticed a thin yellow line (about 1 pixel wide) on my LCD panel running the entire length vertically (I originally wrote horizontally) about 1 centimeter from the far right side.
The line is only noticeable against a colored background and is invisible against white.
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Nov 22, 2014
I am getting a white screen with some light blue horizontal lines. I've do a hard shut down and restart but same result. At one point I did see half of the normal start up screen but it faded away to white.
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May 27, 2014
I updated the BIOS to 2.26 a while ago and ever since then there's no on-screen indication of caps lock on/off, screen brightness or volume when I change it. Since it seemed to be affected by BIOS, I updated again to 2.27 just now, but the problem persists. I needed to update the Hotkeys Feature Integration by downloading the utility thingy from this page. Probably wasn't a BIOS thing after all.
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Nov 25, 2014
System specs:
Lenovo T430U
Intel i5-3427U
8GB PC3-12800 DDR3-1600MHz SoDIMM Memory
HDD 500G 7200rpm Toshiba
mSATA 24GB Samsung Cache
Win 8 Pro, upgraded to 8.1
I rarely use this machine but a couple of months ago I went to boot it up and found that I was not able to get past the Windows splash screen. Sometimes I don't even get the Windows splash screen, I just get a black screen. Rarely I get a Windows screen saying that it is diagnosing a system problem or something to that effect and I can even get to where it will allow me to do some Windows diagnostics but nothing ever comes of it and the process is extremely slow.
I called Lenovo, but of course my machine is out of waranty so the tech just gave me a few pointers and said I could send it in to the depo but the potential repair cost could range up to about 75% of what I paid for the machine in the first place. Anyways, after having me try a few things in the BIOS he suggested that it was likely the hard drive. I mistakenly thought from the time that I bought this machine that the OS was installed on the 24 GB SSD so I ordered a new SSD and swapped it in. This made no difference at all as I have now learned that the mSATA SSD drive is merely for cache to speed up booting.
I am afraid that this means the main HDD is at fault, and quite frankly, if I replace it I am going to do a fresh install of Windows 7. But I do have pictures and docs that I would like to salvage if possible.
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Oct 13, 2013
T400 - ONE
I have a problem with two T400 thinkpads. The first T400 was dead when I bought it ( suspected graphics card ) . Well I managed to get this laptop to boot up. The screen was black but I found by chance that if shine a lamp or light on the screen it is working. Now being able to see what I was dooing on the screen faintly. So I updated the bios & that did not fix the problem but I was well happy about finding out this trick. I then added 8Gb kingston ram which works with my other T400 laptops. I installed Win 7 ultimate. The laptop is working fine. No issues just extreamley dark screen almost black "but working" Very strange indeed.
T400 - TWO
Now the second laptop was working fine. But I was swapping the parts with the non working laptop to determine the problem. Now I have two T400 laptops with a dark almost black screen. But over about a month working on them I am making progress. I am determind not to give up on these computers. This is not like fixing or repairing a computer. More like rezerecting a computer. I did not intend to spend so much time on these laptops but I have found a common problem that effects a lot of people. I would love to know why a working laptop when re- assembled gives an almost black screen & still works. Normally I would just buy a new motherboard & bin the defekt one. What I need is some command codes to try to make the screen brighter. Is this planned obsiletion or just a graphic defekt myth. Because after throwing away more supposidly dead motherboards with a graphic defekt than I can count. I am starting to think that if I get the brightness back on my computers I will have sloved a major black screen problem. It is not the graphic processor. I have been playing fifa 14 with a lamp shining on the screen. It played fine, not jumpy ,no colour stripes just very dark.
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May 18, 2014
Today I was surfing the internet on my Lenovo t500 ubuntu. After a Kernel Panic ( i'm not sure it was that some text on my screen ). I shutdown the computer and restart it but the screen stayed black. Not even Thinkpad logo at boot. The fan is working the lid are working, the keyboard too. So after trying to fix it i went on a walk while the computer was on and when I got back I heard the ubuntu noise when it start. So i try but terminal to run music and it works but the screen stay black. I tried to remove RAM, 10 times shutdown without battery or plug. Nothings worked. I cannot try without another screen yet..
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Dec 15, 2014
Lenovo T400 to install Windows XP on it..It previously worked fine with windows 7 and 8.1.so it boots in windows XP preinstall screen, it formats hdd and like usual installation automatically restarts after that BUT its black screen, lights and sounds show that it works and goes to next screen BUT the screen is still black. Powering down and turn on again is not showing any screen picture. Opened it removed Bios battery, turned up after few on and off it starts it reset bios.
So now there is picture and it goes on the next screen of windows instalation like normal, after installing devices and stuff it automatically restarts like usual BUT it has NO screen again, black screen, lights and sounds again show that its loading windows end instalation screen but no picture on the screen. Reset BIOS again, it starts normaly and this time it shows BSoD with code 0x7B, after BSOD Black screen again..Maybe its a BIOS setting?!? tried installing with drivers for AHCI and tried installing without drivers for Compatible , what else can it be? Updated the bios to latest version, same result. To say it again - it works fine with other windows, but XP must be installed
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Nov 21, 2013
Do you know a tool that can turn off the screen by keyboard?
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Mar 18, 2009
My requirements are as follow:
Screen size : 11 inch
Weight with battery : below 1.3kg
RAM: 2GB or more
Wireless Network : 802.11b/54Mbps(802.11a/g)/300Mbps(Draft 802.11n)
Hard Drive : at least 120GB
Prefer to have carbon fiber casing
Any particular model I should look for on ebay or in the current market ?
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Jan 30, 2014
I've purchased this ram from the lenovo site for my T440p laptop and they said its compatible with the original 4gb RAM which it has. but when I install it in the other free slot and turn it on it cames with a black screen and stucks in it!! When I take it out everything is ok and it turns on normally.
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Nov 21, 2013
I just recently received my first lenovo laptop, the T440s. The overall built quality is excellent and performance is great. However, I realized there is a dead pixel on the screen. I am stilI within the 21 days return limit. I am wondering if I am able to get an exchange for one without such defect and not subject to the restocking fee?l
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Dec 23, 2013
My T540p with Window 7 is experiencing problems starting and shutting down. After booting up I often get a blank screen where just the moused pointer is displayed. I have to hold the power button down to shut down and then try again. Sometimes it takes 2 or 3 goes to boot-up. Quite often when I shut down Win 7 The desktop icons disappear but the desktop background continues to be displayed and the notebook doesn't shut down.
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Jun 7, 2013
I have a T420s that I bought a couple weeks earlier, it's a used one, so there's no warranty with it, I used it several days without any issue, I don't use it very frequently as I use my corporate one most of the time.
Someday when I wanted to turn it on, it stacks on a black screen and it beeps one beep then two other, nothing showing on the screen not even the thinkpad logo at startup, I thought it was a RAM related issue so I put the one from my corporate PC but without any luck, so I wanted to see if its graphic controller issue, I plug the VGA cable on the laptop and my TV and here I can see the thinkpad startup logo but after that I see a message on the screen telling :
"Real Time Clock Error - Check Date and Time settings. Press Esc to continue or F1 to enter setup" and when I press either one nothing happen at all, still stacks there.
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Jul 2, 2014
This computer originally had an issue with the 2100 Detection Error. This computer was previously built with no issues when it was imaged with our company's Windows 8 configuration in which I am highly sure our IT engineers have worked closely with Lenovo on. Also out of the tens of thousand computers that were imaged this way this is the only system I have dealt with that has this issue. I luckily had a good T440 I could test this system's SSD in. The hard drive appears to be fine with no issues. So that rules out to be the SSD. I ordered a system board under warranty and installed it. Everything so far responded fine with the system board replacement until I performed the model type/serial number and UUID update using my 1.86 maintenance update USB thumb drive. After that completed the computer froze on the Thinkpad Logo screen. I verified again for my piece of mind that the memory module and SSD was fine. Sure enough those components were tested fine in a known working T440. So I submitted the system board as a DOA with an explanation. I received another system board to replace with the DOA. I installed that system board to once again update the Model Type/Serial Number and UUID using my USB maintenance disk 1.86 thumbdrive to once again end up with a locked computer at the Thinkpad Logo screen. I have replaced a couple of other T440 and T540 system boards during this time also with using the same USB maintenance disk thumbdrive used for updating those system's model type/serial number and UUID. So I know the issue is not with the USB thumb drive. I am very frustrated with this system. I hate to keep submitting DOAs for the same system.
Since the BIOS is part of the system board and I have not had these issues with the many T440 system boards I have replaced successfully that performing a BIOS update is not a good excuse why this doesn't work on this particular T440 and since after replacing a system board under "DOA" and updating with the maintenance disk and froze there is not a way I can run a BIOs update on this system now right?
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Dec 27, 2013
I have a T420 with the standard 1366 x 768 resolution. If I replace the sreen with a WXGA 1600 x 900 will the graphics card be able to drive it?
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May 13, 2014
For the past several days a narrow horizontal line appears in the lower part of the screen on my Envy dv7 laptop - Windows 8, Intel i5 processor - that I purchased in Janurary 2013.The line flickers in various colors and is very annoying. I pulled up the BIOS screen and the line does not appear. I don't have another monitor to plug into, so I can't run that test. Everything else is functioning normally.
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Jun 30, 2012
I have a 3-yr old Thinkpad T500 laptop w/ XP. My on-screen volume and brightness displays have recently disappeared. Spoke with customer support and was advised to download all the machine updates....did that, but still not working.
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Mar 22, 2009
I have turned on full screen magnifier via Fn+Spacebar. But doing the same again does NOT turn it off. Is there a workaround?
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Jan 12, 2011
Had the laptop for 11 months no issues, I woke up to find the computer stuck on the startup screen. Tried rebooting, took out the battery, tried it pluged in, unpluged and it keeps stopping at the startup screen.
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Nov 16, 2010
There is an image of a black square with an up arrow on the lower right corner of my screen. Sometimes it has a line though it.
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Dec 27, 2011
A new T440s makes multiple times problems after start or sleep mode. Windows 7 comes up but instead of login screen a black screen appears. Just the F7 wireless control gives response. When it happens after wake a programs are runing in background but the screen is black.
I did already all updates, just not my BIOS, it is 2.11 but now 2.19 is available. I hesitate BIOS updates.
I could return the laptop since it is within the 2 week return garantie.
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Nov 9, 2013
Something strange happened on my T440s today when I first turned it on...it booted to windows, then I entered my windows login pin, and then the screen went blank/dark instead of going to the windows 8 tiles. so I closed the lid, and it went to hibernate. and when I opened the lid again the screen came back on and it worked fine.
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Nov 1, 2010
I just got a Thinkpad T510 and when I turn on the NumLock a little black box appears on the screen when it is on and I want to know how to make that not appear when the NumLock is turned on,
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Feb 19, 2010
I have recently bought a T400. At the moment, it is running on Windows XP, Service Pack 3.
After installation of Windows XP, I have installed all the relevant drivers and no yellow question marks appear in the Device Manager panel. However, during the process of installing these drivers, now whenever I plug in our take out the AC Power Plug, the screen goes blank for about a second and then comes back.
This problem was NOT there immediately after installing Windows XP and Service Pack 3, i.e. before installing the drivers. I think that it is one particular driver which may have caused this.
I have already tried re-installing the Graphic Driver.
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