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8095 Posts

11-19-2007

United States of America

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Re: Replaced Screen, even MORE issues now....

2012-06-22, 21:40 PM

Werewolf,


We are looking into the white spots - just brought in a cusotmer example system this week.   Until we have time to look at several of these and see if the spots are randomly placed, whether they developed over time or since day 1, I think it is all speculation.  There are some T420s panels reported with light blotches and as far as I know, those are not IPS.

 

I'm not sure I agree it is fair to disparage the product by painting with a very broad brush and saying "low cost / low quality IPS panels".

 

The light bleed may not be inherent to the panel and can be caused by pressure from the bezel.   I have seen light bleed discussed in forums going back many generations of systems ( I can still recall T60 discussion) so , not sure it is really an IPS panel issue.   

 

Please don't missunderstand my comments as complete denial - I'm aware of the feedback and we've tried to address the items that seemed out of spec including the ghosting issues reported during production of early X220 units.   

 

THS,

 

If your replacement panel has a very clearly evident white spot, I'd like to see that too.  Can you PM me your contact info and I'll arrange to work with you on the LCD.  

 

Thanks!

 

Mark

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8095 Posts

11-19-2007

United States of America

10101 Signins

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  • Message 52 of 158

Re: X220 IPS display problem - weird bright spot on the screen

2012-06-22, 23:25 PM

Andasz14,

 

Glad to hear that you got your screen replaced and the matter is resolved for you.

 

Mark

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21115 Posts

12-20-2008

Australia, Melbourne

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Re: Replaced Screen, even MORE issues now....

2012-06-23, 2:36 AM

From my own peliminary researches with the X220 LCD. 

 

The white spot of the IPS panel isn't a result of low cost/low quality IPS panels, but rather that on the X220 everything is packed too closely together to achieve a thinner top case profile.

 

This essentially means that any flexing motion of the LCD casing could cause the various support mechanisms and wires to put pressure on the reflector plate on the LCD (if the pressure from the support is strong enough, the white spot will result). 

 

I am not sure why the IPS is more susceptible to this then the TN.

 

pd14.jpg

taken from: http://www.epoch-optic.com/product.php?sn=1&psn=2

 

The above is a diagram of how the LCD works. 

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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23 Posts

04-19-2012

Estonia

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Re: Replaced Screen, even MORE issues now....

2012-06-23, 10:49 AM
First i'd like to thank Mark for answer. Really appreciate it. At least this shows, that my assumption about complete ignorance from Lenovo side is wrong.

> There are some T420s panels reported with light blotches and as far as I know, those are not IPS.
When i got my X220, all was brilliant. White spots developed about 3-4 months after light use, unit mostly stayed in dock. I don't know, how T420s panel assembled, but still interesting, why nonIPS X220 owners are not complaining about bright dots.

> I'm not sure I agree it is fair to disparage the product by painting with a very broad brush
> and saying "low cost / low quality IPS panels".

Please don't get me wrong. This "low cost panel" issue came from different sources, not at all with Lenovo.

http://www.hdtvtest.co.uk/news/sony-xbr-mura-clouding-2007033142.htm
http://www.elotouch.com/Support/TechnicalSupport/mura.asp
http://www.avsforum.com/t/1063679/mura-on-lcd-displays

> I have seen light bleed discussed in forums going back many generations of systems
I have seen white dots problem on older units too (T42, T61), but those are developed over years and probably really come from pressure (for example, forgetting pen on keyboard, when closing lid). X220 IPS problems started a bit too early for new units. I hope you will agree, that one thing is strange - of all X220 problems only Premium (IPS) screen owners complained so far about various LCD display issues.

> Please don't missunderstand my comments as complete denial
Far from this. I am really happy that at least somebody (at Lenovo) takes a bit time and answers. Thank you.

lead_org:
> wires to put pressure on the reflector plate on the LCD (if the pressure from the support is strong enough,
> the white spot will result).

I doubt a little that reflector is the reason for white dots. Maybe i'm wrong, but bright dots issue seems to me more like diffusor pane damage.
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81 Posts

07-22-2011

Canada

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Re: Replaced Screen, even MORE issues now....

2012-06-23, 19:29 PM

I had the white spot on my T43 after 3yrs. I was not really surprised after all the bad treatement, but my X220 it was after few month, most time spent in the docking.

 

I sent my laptop and they have replaced the screen, which is good. So that problem is resolved for me.

ThinkPad X220, I7 2620M, 8GB RAM, Intel 320 160GB SSD, IPS screen, USB 3.0, Bluethoot, Cam, Win 7 pro 64, BIOS: 1.17, Model: 4286-CTO, Fabrication date: 07/11
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33 Posts

08-19-2011

Canada

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  • Message 56 of 158

Re: Replaced Screen, even MORE issues now....

2012-06-26, 19:50 PM

@ Mark_Lenovo

 

It's hard to catch it on camera. Even worse though is the light bleeding all across the bottom.

 

I will upload a picture soon. I think you may be right about the bezel. It's possible that it's too tight and simply "pinching" the

LCD inside the bezel.

 

When they replaced my LCD, they did NOT replace the bezel. Just the panel inside.

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17 Posts

03-04-2012

Vancouver

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  • Message 57 of 158

Re: Replaced Screen, even MORE issues now....

2012-06-26, 22:59 PM
Today I had Lenovo schedule a replacement for me. The tech came onsite with a sealed box with the panel inside and took it out to replace it for me. The panel was refurbished, but I didn't mind as long as it worked fine.

When the replacement was complete, we turned on the computer and there was that white spot in the middle of the screen, and a centimeter long scratch on the panel.

Also, in the refurbishment process they used a black colored plastic tape instead of the regular grey tape around the edges of the panel, not only did it over the screw holes which the tech had to cut the tape to access, it was still visible after the bezel was on!

What a joke.

What's up with Lenovo shipping replacement parts that shouldn't even have left the repair center?

http://img685.imageshack.us/img685/3561/20120626123902.jpg
http://img441.imageshack.us/img441/5853/20120626155248.jpg
http://img18.imageshack.us/img18/8666/20120626155324.jpg
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16 Posts

04-07-2011

Canada

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  • Message 58 of 158

Re: X220 IPS display problem - weird bright spot on the screen

2012-06-30, 1:03 AM
Add another x220 with IPS to the list of laptops with this issue... mine. Mine first had a bright spot roughly where the screen would close to the "y" key, now has one roughly at the right Shift or the Enter keys. Are owners with TN screens reporting this in sizable numbers as well? If they are not, it seems like some kind of a clue...
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2651 Posts

03-21-2012

Malaysia

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Re: X220 IPS display problem - weird bright spot on the screen

2012-07-05, 7:51 AM

Hi all,

 

Thanks for posting - please send your machine in for a check- kindly give  our service team a call so they can assist you.

 

Regards 

0 person found this solution to be helpful.

This helped me too

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3 Posts

07-19-2012

United States

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  • Message 60 of 158

Re: X220 IPS display problem - weird bright spot on the screen

2012-07-19, 22:39 PM

I'm pretty disappointed with Lenovo right now.  After about 6 months of owning the laptop (x220 w/IPS) I had 2 brightspots on the screen.  I noticed a third starting to grow and decided to send it in for repair.  I got the same response as many, stating that the bright spots we're caused by pressure and I would have to pay $750 to replace it.  First off, I baby my machine.  I've taken it with me on one trip, but typically it sits on my desk at home.  I've cleaned it on two occasions using the iclear solution and a cloth, but I never use anymore pressure than I would on my macbook pro which I've had for years and the screen is still flawless.  I just don't see how I could of caused this since the spots seem to have appeared on their own.  I went ahead and paid for the replacement, but I'm confident in saying I will never buy or recommend another lenovo product.  The sad part about this was I was pretty happy with the x220 and was planning on moving from Apple to Lenovo products.  Obviously, I will have to find another alternative.

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