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26 Posts

06-03-2015

USA

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Re: When do we finally get a good screen? (P50 4K)

2016-03-31, 15:20 PM

Tk-don, thanks for you your report & analyis. It was very helpful.

 

I think you've asked the million dollar question, are there P50 4K displays out there which are free from problems?

 

It seems, as previously noted on this forum, that other manufacturers are also having problems with 4K Sharp displays (and maybe other 4K displays as well). Except for the display problems, the P50 seems like a pretty nice machine for photo editing. (For what it's worth, the only reason I am interested in the 4K display is the good color coverage - I don't really need 4K otherwise.)

 

I am wondering how to systematically evaluate a new laptop display to discern any problems - right out of the box. I've googled this but have found little usefull info. As I'm fond of bragging, I'm a computer idiot.

 

Thanks.

 

Coop

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125 Posts

01-30-2016

Denmark

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Re: When do we finally get a good screen? (P50 4K)

2016-03-31, 19:27 PM

Hi Coop,

Glad you found it useful.

 

Sometimes display reviews become very subjective - some people don't see the faults other people see because they either haven't seen better displays or because there literally is nothing wrong with the display they have.

 

Objectively speaking, there is nothing wrong with my display. Viewing angles are standardized to the U/D/L/R angles where contrast reaches 10:1. Viewing angles do not tell if this contrast drop is linear with angle. For the 4K display, it definitely is NOT. The brightness /blackness at 45 degrees of angle is the same as up to almost 90 degrees, but between 0 and 20, it is vastly different. To get a proper measurement, you'll need something like a Topcon BM-5AS, but it is insanely expensive.

 

So to evaluate an LCD panel: Use solid colored full screen images to evaluate screen uniformity and viewing angles. Brightness should remain as stable as possible no matter how you look at the screen. Other wise follow the tests available on http://www.lagom.nl/lcd-test/

 

I haven't contacted IBM/Lenovo here yet, I'll include my poblems regarding no signs of ECC support. If they can't promise to solve this, then I suppose a full refund is in order.

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8 Posts

04-23-2016

United States of America

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Re: When do we finally get a good screen? (P50 4K)

2016-04-23, 19:15 PM

Hi tk-don,

 

First, thanks to you and everybody else here for all of your posts -- I'm looking at the same problem with my new P50's 4K display (a brightness drop-off on the left and right sides of the display, visible whenever I'm looking at a full-width white webpage), and the posts on this forum and over at thinkpad.com have helped a lot, to figure this out.

 

If it helps, my P50 has the same 4K screen (LQ156D1JW05), also manufactured week 36 of 2015.  Probably like everybody else, I've spent a few hours searching for images of P50's with the 4K display, hoping that somebody will show an image of a 4K display that doesn't look like this...  Anyway, I've contacted Lenovo support to request that the screen be replaced, but I'm not sure they'll be able to do anything.  Problem is: other than this display problem, the P50 is such a superb machine.

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125 Posts

01-30-2016

Denmark

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Re: When do we finally get a good screen? (P50 4K)

2016-04-23, 20:06 PM

Hi Rojblake

 

Thanks for the feedback - it definitely sounds like you're seeing the same issues with the screen as me. I was making the same considerations, but in the end I contacted support. Such a screen quality just can't be right in this price range. So it's been in for service for the past week by now. Not sure what happens. But I'm hoping they can see the issue and can find a better screen to swap it with.

The reason why I didn't just return the laptop was that I don't think the alternatives out there are better: They lack in some other way.

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67 Posts

03-05-2016

Sweden

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Re: When do we finally get a good screen? (P50 4K)

2016-04-25, 19:16 PM

Hi all...

 

As usual it's difficult to determine how common a problem on a product is by looking at a forum. People with no problems don't tend to report that they have no problems whatsoever! :-)

 

Last Friday I ordered a P50 with a 4K display (and i7-6820HQ, 32GB(16+16) DDR4 2133MHz SoDIMM, NVIDIA Quadro M2000M 4GB, e.t.c.)

 

I know I'm only one person but if I've got no complaints I'll let you know... but if I do I'll let you know as well!

 

I'm a good photographer and I'll make sure to post a representative picture of my (hopefully) excellent 4K display :-)

 

Hopefully my P50 will be delivered to me this week...

 

Brgds...   /Thomas

 

PS. FYI... my expectation is that my new P50 screeen will be at least as good as my 5-year-old x220 IPS display!

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1 Posts

04-27-2016

Germany

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  • Message 46 of 168

Re: When do we finally get a good screen? (P50 4K)

2016-04-27, 15:48 PM

Hi there,

 

got a replacement on the 4k LQ156D1JW05 display from a Lenovo technician, same problem :( Bad viewing angle and a darker right edge...

 

I'm considering replacing the 4k screen against a FHD display since most of the applications running on the machine won't be hidpi ready in the near future. Just chose the screen over the FHD because of the much better ratings *lol*

 

Can anyone suggest a good FHD non glossy screen avaible in Europe? Whats the connector eDP and 30, 40 or 50 pins? Has the LCD cable to be swapped and even the BIOS modified???

 

Thanks for replies and further information

outlawx

 

 

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125 Posts

01-30-2016

Denmark

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Re: When do we finally get a good screen? (P50 4K)

2016-04-27, 16:31 PM

Hi Outlawx,

 

Ouch! May I ask what the reason was you sent in the laptop for panel exchange in the first place? Was it due to the dark edge and viewing angles or some different issue with the panel?

What company carried out the repair of the P50 for you?

 

As for a replacement panel: My suggestion would be to have someone dump the EDID of their P50 FHD display and send it to you. You'll most likely need it. You'll also need a panel where the EEPROM for storing the EDID is NOT write-protected from factory.

But as to getting further help on the official Lenovo forum, I think would get me/us kicked, so it's probably best discussed elsewhere.

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8 Posts

04-23-2016

United States of America

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  • Message 48 of 168

Re: When do we finally get a good screen? (P50 4K)

2016-05-04, 22:30 PM

Hi everybody,


Just an update: I sent in my P50 w/ 4K for repair.   Just for background: I'm seeing the problem of brightness variations on the left and right vertical edges of the screen -- the screen just looks darker on the left and right edges, when looking at a completely white screen.  Um, for instance, when viewing Lenovo's forums on full screen :) ).

 

I got a call back from the repair depot with the report from the technician: they're saying that that's just the way all of the screens are.  That they all look that way.  I asked them to please look again, but I'm nervous that all of the P50 4K screens are affected?

 

Well, I'll keep you all posted -- maybe I'll have to keep my eye out for a better 4K screen, to replace it myself, when they are available.  I like working on laptops, but never thought I'd be thinking about screen replacement already with a $2K laptop...

Good luck, everybody.

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2032 Posts

11-28-2007

Czech Republic

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  • Message 49 of 168

Re: When do we finally get a good screen? (P50 4K)

2016-05-04, 22:50 PM

I got a call back from the repair depot with the report from the technician: they're saying that that's just the way all of the screens are.  That they all look that way.  I asked them to please look again, but I'm nervous that all of the P50 4K screens are affected?.

Yes, the screen is typical cheap crap Lenovo is still use in premium price laptops. It is hopeless.

__________________________________
ThinkPad (1992 - 2012): R51, X31, X220, Tablet 8.
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2377 Posts

04-20-2008

United States of America

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  • Message 50 of 168

Re: When do we finally get a good screen? (P50 4K)

2016-05-04, 23:12 PM

The 4k IPS screens on all of the laptops (Lenovo, Dell, HP) that I've seen suffer from backlight bleed to a lesser or greater extent. I have a T460s WQHD screen which is quite nice and does not have any flashlights or hotspots and does not use PWM. I would expect that the PC makers will be moving to OLED screens before long (there is one already on one of the YOGA laptops) and the colors and contrast levels are just amazing. My first P70 had a bad screen, but the replacement was acceptable (still had some bleed at the bottom corners), but I don't run a black background so it's just a data point to me now. I can remember when the LCD screens all used to have some number of stuck pixels (on or off) and that was the way the state of manufacturing could deliver panels. There were CFL backlights that used to go dim/red after two years or so. Finally LED backlights became common to replace those. Mass manufacturing is a compromise of supply and cost. I'm OK with the current trade off on the screens for the P70. The colors are awesome, the clarity is great, and the brightness is good enough that I can work in a sun lit room. If you want a more consistent panel, buy a separate monitor for $5000 which has self contained color balance for critical photographic work.


P53 XEON 2276 BIOS 1.31 OLED UHD 4K Multi-touch display, 96GB RAM, RTX5000, RAID 1, 1TB x 2 Samsung PM981, 1TB PM981, WWAN
P70 XEON 1505, BIOS 2.35, 4k Display, 64GB, M3000M NVIDIA GPU, RAID1 1TB Samsung PM981 PCIe-NVMe SSD x 2, 2x Samsung 850 Pro 1TB SSD. EM7455 WWAN
P1. BIOS 1.36,Xeon Processor, 4k UHD IPS multi-touch display, 32GB, PM981 1TB x 2, RAID1

I am not an employee nor an agent of Lenovo.
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