Lenovo T400 / T500 :: Screen Blinks When AC Power Is Connected Or Disconnected
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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Jan 22, 2015
I bought this computer which is running 7win64 to update my T60 which I use with my home TV, a samsung digital running at 1360x768 resolution. The computer's native resolution is 1920x1080. I bought an hdmi adapter for the displayport from lenovo when I ordered the computer. Initially, the display works and at first it ran long enough to get everything set for a nice crisp display that fits the screen perfectly. The sound is there too, and is passed on to my receiver by the TV. Very nice. But then it begins to blink off until it doesn't work at all (the sound is cut off too). Lately it won't stay on long enough to review settings.
All updates are in place, both from microsoft and from lenovo. This has Intel 4600 graphics built in, and intel has graphics drivers available, but won't install them because of the lenovo supplied drivers.
I can't get any support from lenovo support because another device is involved.
I read online of some early users who had this problem with a docking station and i guess the problem was resolved with an updated driver.
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Aug 5, 2013
After using for about 12 months my Lenovo T430 2349-GRS without problems, the fan started working loudly all the time I have turned on the PC (all working day from Monday to Friday, T430 connected to the powersupply/charger).
I used the tool HWINFO64 to monitor the temperature and fan speed and realized that the motherboard temperature is working continuously all day above 65°C, and the fan speed is above 3800rpm, so it becomes very noisy.
Then I realized that if I unplug the power supply from the T430, in a few seconds the noise goes, and the computer become silent again.
Below is the image with HWINFO64 log results, in green you will see the T430 with the power supply UNPLUGGED, and in yellow when I connected the power supply.
In the last column of the image, you will see the fan speed in RPMs.
Is there any way to solve this? The fan is very noise above 3800rpm.
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Oct 26, 2014
I can't adjust my screen brightness using the Power Manager. Updating to the latest release of the ThinkVantage Communications Utility did not solve the issue. I can't make the screen either brighter or dimmer.
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Dec 23, 2014
my Lenovo T410 laptop won't start. I hit the power button and it looks like it's about to boot up. The thinklight blinks on as normal, the cd drive is checked, the caps lock button blinks on, then nothing. No display, and keyboard is unresponsive. Power light remains on; if I leave it a while the fan comes on. I can turn the machine off using the power button, but the problem remains next time I switch it on.
I've tried removing power and battery, pressing power button 10 times then holding power for 30 secs, before replacing power and battery, but nothing happens. I've tried using a different keyboard. I've tried plugging in an external monitor. No change.
This problem appeared after I left it on overnight. I have a hunch that it went into hibernation mode, perhaps, and that it disrupted some important function which it was unable to complete.
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Sep 18, 2013
My T420 takes about 20 seconds from pushing the power on button to the Lenovo POST screen. After that boot takes about 30 seconds to Desktop. What bothers me is this long wait until I see the POST screen. It doesn't seem normal to me.
My System is setup with Windows 7 64bit booting from UEFI on a mSATA Crucial M500 SSD. It has 16GB of Ram and a i7 CPU. I have the newest BIOS (1.46) installed.
Why it takes this long to reach the POST screen?
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Nov 8, 2014
New ThinkPad T440p and the first issue I encountered is there is no option to disable the touchpad when an external mouse is detected. I don't want to do it via the bios or some other hack as I use the touchpad when it is not convenient to use an external mouse. So it should be able to do the switching as needed, this is a simple feature that other manufacturers have had for years and years.
I already upgrade the UltraNav Driver to the latest v18.0.7.57 and that didn’t present a solution. I am running Windows 7 SP1 - 64bit.
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Oct 23, 2013
I have just installed an i7 2670Qm on my T420 today.The machine will crash pretty soon after booting up, with the screen having colorful vertical and horizontal lines before it restarts itself and give the memory error beeping pattern (1 beep-pause-3 beeps-3 beeps-pause-1 beep).So then I took out one RAM from the bottom, and the machine appears to work normally again, more or less.
In the OS (Win7 64), The power manager alerts me that the 65w AC adapter is giving not enough power, so the laptop is running on battery. I thought I just need a 90W AC brick so the laptop will work as it should, so I am arranging a 90w one to come in later. But on a second thought, if the battery cannot start the laptop with 8GB of RAM properly.
Is it the CPU or RAM or Mobo or something else? Where should I look?The machine works fine with the previous CPU i3-2310m and 8GB of RAM.The RAM modules I have are 2 x 4GB Samsung 2Rx8 PC3-12800S-11-11-F3.The BIOS version is updated to the latest 1.46.
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Nov 25, 2013
I enjoy the feature of automatically powering off the optical drive in power manager. My issue is after reformatting my T530 the option is there until I do an update using the Lenovo ThinkVantage System Update. One of the updates seems to remove the feature from the power manager.
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Jul 24, 2014
I have a refurbished T410 that words fine and charges the battery when plugged in. When I remove the power ca ble, it dies immediately. The battery shows fully charged, but will not turn on unless the power cable is plugged in.
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Jun 17, 2013
I have three drives: mSSD, HDD, HDD in ultrabay. I think this is taking its toll on my battery. My first HDD is often used since it has my "DownloadsFirefox & uTorrent" folders. However, my second HDD only has music. Is there a way to have it automatically power-off when I don't play music from that drive?
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Jan 7, 2015
I'm tried hard-booting the device, but no dice. When I push the power button, I show activity in the status lights and can feel heat coming out of the heatsink. I think I see the 'ThinkPad' screen displaying very faintly at that time, but it seems not to proceed through the regular boot process. I'm definitely not able to get to a BIOS post.
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Jul 3, 2014
I returning my T410 supplied by my employer as I am leaving the company. Would like to change the power on password, but cannot see the option to do it. I do know the password so was assuming this should be stragiht forward.
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Sep 11, 2014
My T420 doesn't power on at all. I have tried to turn it on with cable, w/o cable, different baterries, removed rams and tried same things, tried holding down power button for 60 secs, tried with an other keyboard and I couldn't manage to start the laptop. No reaction at all, no blinking or anything.
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Mar 8, 2014
I has just upgraded my Thinkpad t440 from windows 7 to Windows 8.1 pro. But i could not find Power Manager software to install in my laptop. I want this software to manage my battery to ensure that it stop charging when 80% capacity. I think that it is useful for my battery.
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Jun 21, 2010
I have a T430s with Windows 7 Pro 64-bit that is not entering 30 Day Standby like it should. The issue seems to lie with Power Manager.
Inside of Power Manager I have the 30 Day Standby option checked, just like I should, and it is also reflected in the BIOS setup as well. If I change the BIOS transition time for 30 Day Standby to "Immediately" and start Windows, but don't log in, and put the computer to sleep. It almost immediately wakes up and transitions into 30-day standby.
Now I know that Power Manager has a "hard coded" setting of 3 hours, regardless of the BIOS setting. So after 3 hours, Power Manager will automatically wake up the computer like it would to transfer to 30-day standby, but it just goes back to normal sleep.
Today while on battery, it did this twice (according to the Windows Event Log) Wake up, and go back to Sleep / Standby (S3). In the logs, the wake source is listed as "Unknown" when it goes back to sleep 10 or so seconds later is listed as "Application API".
Like I said, I was running on battery, and I also went into device manager and unchecked anything I could think of that would have an option of "Allow this device to wake the computer". I also disabled the Wake-on-LAN option for the LAN card. Plus I had all USB devices unplugged, as well as no Ethernet cable in the LAN port anyway. Plus it does transition to the 30-Day standby if I force the computer to sleep at the login screen before Power Manager is loaded.
I just wanted to add I should have all driver / software updates as of Dec. 1 or so. I'm running Power Manager 6.63.1 and Power Management Driver 1.67.4.4.
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Nov 3, 2010
Symptoms: Laptop switches off unexpectedly; unexpected failure to charge battery; random changes in brightness. Messages appear such as: "This AC adapter may not provide enough power to your Lenovo computer. Please reconnect the proper AC adapter"; "Battery 2: There is an error"; Do you want to switch to 'Airplane in-seat power plan' (if this option is enabled in Power Manager).
This is why I think the power connector is to blame: I opened Power Manager to the Battery tab and also ran BatteryInfoView by Nirsoft. With the power connector firmly plugged in at the back of the laptop and with "90W AC adapter is attached" showing in PM, moving the connector slightly from side to side often triggers one of the symptoms. The two apps then indicate that the AC adapter is no longer present and that charging has stopped. In some cases vibration due to typing or moving the laptop is enough to trigger a symptom.
Supporting evidence: After I taped the power adapter's output cable to the laptop so the plug cannot easily move in its receptacle I found the symptoms stopped (see photo).
Summary:This is a serious annoyance. It means I can't rely on the battery being properly charged when I need it, or that the machine will stay running when I leave it unattended.
T540p / 64-bit Win7 / 840 Pro SSD / Ultradock.
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Feb 28, 2011
My thinkpad T410 (2537-UQF) with an OCZ Vertex 3 SSD only boots if the power supply is plugged in. If i have full battery and try to boot without the power supply i get a blue screen after being about 60 seconds in the screen where the windows logo appears. I have Windows 7 installed fresh a few days ago.
I think its possible, that i have made some failure with the drivers. The ThinkPad Power Managers always stops working after booting. So i have removed the program by using the "msconfig" functionality.
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Oct 31, 2013
I'm experiencing regular BSODs on my T430s / Win7 when going into sleep mode (Fn-F4). The error message is driver_power_state_failure. This happens almost every day.
I know this is quite a common issue (I also had it with an older T500, but not on T420). After googling around, I've discovered WinDBG and the way to identify the faulty driver that is causing the problem.
However, I couldn't install the tool - neither the debuggers package (referenced from windbg.org), nor the toolset+.NET framework from the Microsoft website. The former keeps exiting the installer without any messages (although Remove Programs dialogue shows the thing installed, there appears to be no program to run), the latter fails to install without any diagnostics (tried installing debugging tools only, tried installing the complete package - same outcome).
So, need to analyzing the memory dump and identifying the faulty driver? Which file is needed for that - the complete memory dump (from /Windows/ folder, ~500 MB in size) or the minidump file (from /Windows/Minidump/ folder, ~700 KB in size)? Or both?
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Dec 11, 2014
I've been trying to set-up a second hand T520 bought without the original hard drive. I've installed a Samsung mSATA SSD. I tried to use a set of recovery discs produced on my T510 which seemed to install but got BSOD whenever Win 7 tried to boot. I then downloaded the Win 7 ISO and booted from the DVD to try and initialise a repair which would not initialise. I next tried installing Win 7 Pro from the Win7 ISO disc which succeeded but ran into problems with unrecognised network components and drivers.
I've gone through this whole cycle again and got to the set-up screen for Win 7 then got distracted; my thinkpad then appeared to have gone into hibernation before I could finish set-up. Unfortunately, when I try to power up I get a few flashing lights for a few seconds; no POST bleep and the power dies. I've tried pulling and reinstalling the RAM and SSD but to no avail.
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Nov 7, 2013
I had an admin power on password on a T420 that contained a character that isn't allowed in the newer version (old password had a dash - in it) and I didn't remove the password prior to update so now I can't get into the BIOS as admin - are dashes changed to something else during update or can I revert back to a previous bios version (if so where are they located)?
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Aug 7, 2014
I have a T530 with an SSD, less than a year old, that appears to be bricked ... when the power button is pushed, there is absolutely no noise (no fan, no beeps) and no indicator lights.
I'm having trouble getting the "what happened" story out of the user but I heard something like "the battery ran out and now it won't start". I suspect some improper behavior like hauling the machine around when it was "sleeping" (not off) but that as they say is another story.
Elsenet I saw the following "one weird tip" to discharge static buildup (*)
* unplug power
* take out battery
* take out RAM
then a sequence where you pushed the power button 9x and on the 10th time held it for 30 seconds. Then plug power in and try again. No soap (although the ram is internal, not in the expansion slot, so I haven't disassembled the keyboard area to check).
I also unplugged the battery/power and held down the power button for one minute - still no luck
Swapped out power supply and battery - no luck
Only indications of "life" are the little battery icon on the top of the case (e.g. when computer is closed):
- Battery not installed - put power cord in, icon flashes green 3x, stops, but power button does not turn on
- Battery installed - put power cord in, icon flashes green 3x, flashes long orange 1x, flashes short green 1x more
Is there something else I can try or is this a "Call IBM/Get this guy a loaner"?
* laptop appears to be staticy, I have gotten a couple of "snaps" off it, and that doesn't regularly happen
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Feb 6, 2011
I just got my ThinkPad T530. Things are going ok with it, the keyboard isn't as terrible as I had thought - but certainly didn't wow me like the keyboard on my T510 which I think was the best keyboard any ThinkPad ever had.
Anyway, something I have noticed, and that is sort of a problem for me, is that this computer is not making the typical "power status change" beeps that every other ThinkPad has ever made. You know, the dee-dum, dum-dee that go along with plugging or unplugging the AC power adapter. Also no single beep when it finishes going to sleep, or wakes up from sleep.
How I get these back? I didn't see anything obvious in the BIOS or Power Manager.
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Jan 20, 2013
I recently my new Thinkpad T530 and I accidentally uninstalled Power Manager. I re-installed it. Now when ever I log on It says, "RUNDLL: There was a problem starting C:/Program. The specified module could not be found." And whenever I turn on the icon in the taskbar it is gray and has three dashes.
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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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