My T400 Monitor is flickering !!!

Hi people..
I had recently got Thinkpad T400 (3 months back).These days for reasons unknown,my screen is flickering at times. Please help.I don't know what the problem is.

Fugitive wrote:
Hi people..
I had recently got Thinkpad T400 (3 months back).These days for reasons unknown,my screen is flickering at times. Please help.I don't know what the problem is.
Are you using Vista or Win 7? If so, this tip maybe of some value for you.
http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-74739
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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IMac early 2009 freezes and monitor is flickering

Hello,
After being a Macuser for about 25 years, i now have a question.
After a while my old iMac (iMac (24-inch Early 2009), OS X Yosemite (10.10.2), 2,93 Ghz, 8 GB RAM, GeForce GT120) suddenly freezes and the Monitor starts flickering. The upper half is flickering and the lower half is black.
Only way to get back to it, is to do a hard reset by holding the Power button for a while. Then it starts up normal. Sometimes it asks for sending a Crashreport sometimes not.
Does anybody have an idea?
Cheers,
Thomas

Difficult to say, run Apple's Hardware Test in extended mode 2-3 times back to back. The reason to run it multiple times is AHT does not always find errors after the 1-2nd pass, however when it does they are correct. If errors are found, take it in for service.

T400 LED screen flickeringly

i bought T400 2764 CTO one year ago just because "thinkpad" name and it strong body and reliable quality;
in the june, just pass one year warrantee period, it screen start flickeringly--i did change adapter, switch the graphical card to internal or ATI again and again, never change the situation, really driving me go crazy, i also connected with desk TFT monitor, it screen showed normal
any one has the same experience on it please?
** bois and s/w to be update **
RGDS
Richard

this is a routine check, i just want to make sure it is your hardware that is having the problem and not some peripheral parts that is giving the problem.
In any case, i think it is a LCD related issue. Do you have warranty still? Flickering issue is related to the LED backlight that is used in your LCD.
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

Monitor Is Flickering - ATI Display Driver Problem Error Message

Hello, for the last few weeks, I have been having a monitor issue. Everytime I turn my computer and monitor on, it is flickering like crazy on my HP 2509B Desktop Monitor, and on the right bottom corner a flag shows up with ATI Display driver, and I am trying to figure out how to repair this monitor issue. I don't know if it is coming from the Monitor itself or its coming from the Mother Board TOWER, I am going crazy with this and its hurting my eyes everytime I turn it.
Sometimes the flickering would just go off by itself, and now its doing it constantly. I don't know what to do with this.
I love my monitor and I hate to see to replace it or something. Please help me with this. I hope it is not a driver hardware issue.
I would greatly appreciate all the help I can get to do this myself if not then I am going to have to take to the store I bought it from and get them to help me out, but I want to do this on my own. If you can help. Thanks

if you have another monitor you can test it to see if if does the same thing and also check the cable and maybe use a different one to see if the cable is not the cause which i doubt
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Why is my 2007 HP V17 monitor screen flickering and going black?

I have an old 2007 HP V17 monitor attached with a VGA cable to an early 2008 Macbook running on OS 10.6.8 software via a DVI- mini connector (this is also my desktop computer).
About 6 months ago, the HP display started going white and sometimes gray for a few seconds before the image would return, and a couple of times I had to unplug it and restart the Macbook before it came back. I followed Apple's instructions for testing whether the problem was in the computer (= resetting the system by resetting the Mac's parameter RAM and SMC), but the computer tested okay. I then purchased a new VGA cable and DVI-mini connector, but the problem persisted.
Today the HP screen suddenly went black (first time going black) and stayed black. The power button stayed lit and if I pressed the Volume or Auto buttons, the "Volume" etc. message boxes did appear, so the device's backlight is apparently working and not burnt out (unless the backlight has nothing to do with the message boxes showing up, which for all I know may be the case). However, the Desktop showed up only on the Macbook.
I checked all the connections, removed the DVI connector and plugged it back into the Macbook several times, but the HP screen stayed black, so I removed the DVI connector in order to type this message on the Macbook. Then, as I was writing this, I decided to plug it back into the Macbook one more time--and sure enough, the display is back!
I love this monitor, which is the perfect size and ergonomic height for my setup, so I'd hate to have to replace it. Can anyone tell me
Given the information above, what's the probable reason for the flickering and going to black? If it's the computer, what could it be? Can I solve this problem myself? (See above; I couldn't find any other ways to test the computer in the Apple articles database.)
If not, could a monitor this old be repaired?
If so, how much would repairing it cost, since buying a new monitor that I probably wouldn't like as much would cost upwards of $300?
Thanks so much for any advice out there!

Hello @turtlewiz,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that your HP V17 Monitor has gone black and is not displaying anything. I am providing you with some steps for you to try below:
Step 1. Unplug the power cord from the back of the monitor and the wall
Step 2. Hold the power button down for at least one minute
Step 3. Plug the power cord back into the monitor and then into the wall outlet (not a power bar or surge protector)
Step 4. Press the Menu button on the monitor
Step 5. Navigate to the Factory Reset option and select it
If the issue persists after this you can try the monitor on another computer to see if it continues. If it does it appears to be a physical issue and I think it would be best if you contact HP Technical Support for repair options.
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"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

Monitor is flickering after upgrading to Mavericks

Hi eveyone,
As many of you already did, today I've upgraded my MacBook Pro i5 2.5 GHz/8GB RAM from Mountain Lion (10.8.5) to Mavericks (10.9).
Unfortunately, I'm experiencing serious and unpleasant issues since I installed the upgrade.
Specifically, my monitor flickers almost every time I scroll an application window (e.g., Safari) either using an USB mouse or the trackpad.
Moreover, when I pass the mouse over the Dock, this starts vibrating from time to time.
The same happens also to the external monitor I usually connect to my laptop via the MiniDisplay to VGA cable. The external monitor is an LCD Samsung SyncMaster B1940MR.
After several reboots and given that one of the new features of Mavericks is the new management of external monitors, I've tried to re-install from scratch the OS X upgrade without connecting my laptop to the external LCD but still nothing has changed.
I'm really annoyed by having both monitors flickering. Another particular thing is that if I try to click on the Finder menu appearing on the external monitor, this makes flicker the primary monitor approximately at the same coordinates (i.e., at the Finder menu of the laptop monitor).
It seems like something is going wrong with the video card drivers but this is just my conjecture.
Are you guys experiencing the same or is there anything you might want to suggest to solve these issues?
Thank you in advance

Iv upgraded to maverick and not at all happy... first off my thunderbolt does not work any more....
And now the apple monitor im using with my laptop (macbook pro I7 2.2ghz / 8gb ram / AMD Radeon HD 6750M 512 MB) via mini dvi flash's to a black screen every now and then...
Im not sure about the monitor flickers you guys are getting? Im literally getting the monitor display a black screen as if the apple screen is switching off and on again because of loss of signal?
Really anoying when trying to right code and design!
APPLE FIX THIS PLEASE! before i download adobe suite for my windows 8 partition!! and yes i just said that! >_<

T400 LCD Screen flickers or blinks every 5 seconds

T400 with Win XP Pro and Integrated Graphics, all the latest updates. Even did a Rescue to original factory.
I have read numerous issues with Thinkpad screen flickering, but have not found a solution for my laptop.
My T400 just started doing the following: Every 5 seconds, the screen will flicker one time looking like an old CRT screen rolling over once. Every 5 seconds. Oddly, this occurs only at the 60Hz rate. When I set the rate at 50Hz, the problem appears to get fixed. I have disable the Graphics Battery power option.
The flicker occurs during boot up even on the initial black / white screen, narrowing it down to hardware or bios.
Given the number of LCD issues I've read about on this era of machine (2009), I called Lenovo to see if there was a recall - they said no. I'm a Thinkpad fan, but I am beginning to wonder if Lenovo is not acknowledging a known defect.
I just want to know what to fix. Is this a defective LCD screen, or a motherboard chip issue?
Any thoughts out there??

This isn't a widespread defect AFAIK.
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External monitor occasionally flickers

I haven't seen a post about a problem that seems exactly the same as mine.
My MBP is the 2010 version and is hooked up to an external monitor via DVI. The problem is that the screen briefly shakes, lasting no more than half a second. It does it sporadically with no regular pattern-sometimes its two hours between when it does it, other times its five minutes. It isn't a huge problem in terms of usability, but I paid too much for this computer to have a problem.
I know it isn't the monitor or the cables because I've tried different monitors and cables, including using different mini-DV cables.
Thanks!

How did you setup your display preferences? Under the arrangement tab, it will differ on which one is your main viewer. Not to mention where (which monitor)your tab menu is set. Do you have the right adapter for your external monitor?
When does it blink; when your starting up? Jon
I did go throught the display preference. The external monitor is located to the right of the imac on the arrangement tab.
I'm not exactly sure what you are referring to with how the tab menu is set. The display tab is set to 1280x1024, millions of color, 60 HZ (other option is 75HZ).
The color tab has a defaul profile of VE710s-2 which I just used from day one.
The monitor only has an analog in (no digital), so I'm using the apple adapter for the small square plug on the back of the imac to analog. I didn't think I had any other choices (right or wrong) for that item....
wwc

External Monitor Occasionally Flickering

Hello,
I have a MacBook Pro 13 Late 2011 model that's plugged into an Asus P28Q 24" IPS monitor, closed lid configuration. It runs fine for a while then will flicker randomly for a duration of a few seconds to a minute or more. I have an identical configuration running on the latest MacBook Pro 13 Retina with no issues. I switched monitors and was able to replicate the issue again on the 2011 MBP ruling out the monitors. Everything seems to be updated on the 2011. Any advise would be appreciated. Here's video of the monitor flicker. http://youtu.be/sxaMTlF5ktQ
Thanks,
Chris

Hi FitDadsRock,
Thanks for visiting Apple Support Communities.
If you've noticed unusual behavior with an external display on one MacBook Pro, the steps in this article can help:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
I'd suggest starting with this step:
Reset the system
You can reset the Mac's parameter RAM and SMC.
Regards,
Jeremy

My T400 has a flickering horizontal line at the bottom of the screen.

A horizontal, flickering band has appeared along the bottom edge of the screen. When it settles down, there is just a thin line across the taskbar icons. Kindly assist to remove it.

Hi Mtshali,
Here is some info regarding your issue:
http://answers.yahoo.com/question/index?qid=20110725163248AAEzk8r
How long have you had this issue?
Are you still under warranty?
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Monitor screen flickering after login

Hi, i m using Yosemite and recently replace the entire font folder with previous OS fonts and encounter the problem with monitor screen blink on and off after login. Please help.

Hi, i m using Yosemite and recently replace the entire font folder with previous OS fonts and encounter the problem with monitor screen blink on and off after login. Please help.

IMac display monitor problems, left side darkens and flickers

I have an iMac with 2.7 GHz Intel Core i5, 16 GB 1333 MHz DDR3, AMD Radeon HD 6770M 512 MB running Mac OS X Lion 10.7.5 (11G63). The last year the left side of the monitor was flickering intermittingly. I didnt think much of it. Then in July, one big flicker caused the left side of the screen to darken slightly. Fortunately, my AppleCare was still in effect,. I contacted Apple and they had me zap the PRAM and also reboot into Recovery mode. The darkness was still apparent. So I took it to an authorized dealer and they fixed the display. Now tonight, one big flicker happened and I noticed that the left side had darkened a little again. I zapped the PRAM and it seems to be ok now, but I'm afraid that the same thing will soon happen. And of course the AppleCare has expired finally. Has anyone encountered this? I have four external hard drives on a shelf right next to the display. This sounds silly, but could they be affecting the display in any way? I moved them a few feet below where they were, hoping that they werent the cause of the problem.
Any advice would be most welcome.
Thanks!

had zapped pram not helped then I would had said that the lcd panel itself was close to the end of it's life and replacement would be required but since it did then I have no real cause to believe the issue would come back

Flickering screen on external monitor

Hi, when I connect my 2011 Macbook Air to a external monitor, the screen of the external monitor is flickering. Tried different cables and monitors, same problem every time. So my guess is, that it's a problem with the hardware of my MB? Is it easy to fix, will Apple fix it when I'll bring it to the Apple Store? Actually, I can't live without my Macbook for a while, because of my work. The problem was always there, but it's getting worse and annoying, because I bought a new very expensive external monitor.

Same with my macbook pro 13" 7,1 (mid 2010) but also with resolution same or under 1080p

External LCD Monitor Flickers for 10 - 15 minutes before it settles down

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I've had this monitor for more than one year, without any problems. I've recently updated the nVidia Ge Force 7300 video drivers on my Windows XP Pro SP2 system.
Actually, the problem is not the monitor. I can connect this monitor to a second laptop and it works fine, with no flicker.
I have PC-Doctor 5 installed and the video tests for the nVidia GeForce 7300 and the external monitor itself ran with no problems.

I have a similar issue: external Samsung monitor worked fine on Vista, but I could not stand Vista. I put Win Xp Pro on... and I cannot get any signal out through the VGA port now. The monitor works fine (still), tested with two other latptops.
My suspicion is that the nVidia driver files, possibly the .INF, may need tweaking / replacement / etc.
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Hp lv2311 monitor flickering

Hi guys,
I recently bought the 23" HP LV2311 Monitor and I noticed that it has a flickering problem. This is especially apparent when I'm in a full screen game (every game I played flickers)
My PC unit is a notebook from ASUS G53-SN
Graphics card is Nvidia Geforece GTC 560M 2GB
Any ideas on why?

Hello OneMoreCouch,
I understand you are stating that your HP monitor occasionally flickers, is that correct? I will do all I can to help you with this issue.
By chance have you hooked the monitor to another computer or laptop to see if the issue occurs?
Also HP monitors do have drivers as well, I am not sure of the current operating system on your ASUS but here is a link of possible drivers that you can install. Just click on the current operating system on the computer and see what is available.
Another thing you can also try is a factory reset of the monitor; this does not affect the computer. Press the menu button on the monitor and toggle down to factory reset. The monitor will more than likely blink a couple times, or restart itself.
Please respond back at your earliest convenience.
Thanks
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My T400 Monitor is flickering !!!

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