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CrossOver 27Q LED/LED-P, 27M LED, & 2720MDP GOLD LED Monitor Club - Page 508

post #5071 of 6483
Replacement boards?
Hello,

One of the things that worries me about buying one of these is : what happens 2 or 3 years down the road if it dies? I'm sure I'm not the only one who worries about such things. Most people seem to have good luck with them, but I see the following
occasional issues:

* Monitor died completely
* Big band of flashing green pixels
* Monitor whines
* Power brick whines
* Power brick makes a clicking sound
* Monitor won't stay on.
.....etc.....

Now, I used to be a bench tech. That is, I fixed electronics for a living. I am reasonably confident that I can take care of
most things if I have the following 2 things:
1. Info ( schematics, parts lists, etc )
2. Access to spare parts

For grey market Korean stuff, I don't expect to ever have access to #1. What about #2?

Here's an ebay listing:

http://www.ebay.com/itm/Video-driver-board-repairing-backlight-Crossover-27Q-monitor-and-etc-/111016273461?_trksid=p2047675.m1850&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D14294%26meid%3D5772922325718900974%26pid%3D100011%26prg%3D1095%26rk%3D1%26sd%3D111004092960%26

Now THAT's interesting. The LED driver board is probably the hardest working board in the monitor - that is, it handles
real power. Experience shows me that the higher the power, the more failures.

It's interesting also that the listing is in Russia. I've been there. I've been to the Moscow radio flea market. In Russia, they
fix things. Things that we would throw away. It's a tradition from communist times, when "things" were more valuable than "money".

A few years ago, I had a (IIRC) Viewsonic monitor that would turn itself off. I traced it to a transformer with an arcing coil in the backlight driver. "Traced" is actually an exaggeration - I just looked at the board and saw the burned spot. This monitor was
quite fixable with a new coil. I read the part number off the coil, and searched high and low. Found it on a Russian website
that unfortunately only dealt locally. I sent them an email in Russian - no answer. Then I found another Russian website
with instructions on how to rewind that exact coil. Wire size, how many turns etc. So I still could have fixed it.

Unfortunately, in the meantime we had to move, and there was just no time to deal with it, and it went to the recycler.

Maybe I should buy two of these things, enjoy dual-giant-monitor bliss, and know that if one dies, I have the other one
as a spare parts source and example ( of one that works ). With an example like that, one can often fix things without having
schematics. Been there, done that...

- jerry1234
post #5072 of 6483
Quote:
Originally Posted by jerry1234 View Post

worries about monitor

Then it's dead. Alas. That is the risk you take in buying these monitors.

If you want support and worry-free operation, buy a Dell U2713hm. Sure, it costs more, but peace of mind (and 3 year premium advanced replacement warranties with guaranteed phone support) is like that.
post #5073 of 6483
Quote:
Originally Posted by rho86 View Post

I've had problems with OSX incorrectly reading EDID data from another monitor, as well as my TV. It seems OS X is far more finicky than Windows.

Mabye you can try forcing a custom screen resolution using various guides on YouTube. Here is one:

http://www.youtube.com/watch?v=JZuIgpue0zQ

I've got switchresx installed and tried some custom resolutions to work, but it still produces this outcome. Does anybody have any ideas on some resolutions/timings to try. I tried 2560x1440 at 40Hz and that didn't work either.

I'm about to give up on this monitor, so if there is anybody out there looking for one, let me know. I don't think I'll be able to return this to AccessoriesWhole without losing shipping $
post #5074 of 6483
solution: pc

biggrin.gif

in all fairness it's the same indentical monitor apple uses, you shouldn't be having issues. feel like it's something wrong within your installation of osx. especially if it works in windows, but yet again when it comes to anything mac...i have no clue as most people on this forum wouldn't.
post #5075 of 6483
Quote:
Originally Posted by bleepjay View Post


Can somebody with a 27Q (preferably a blade) run this program: http://www.entechtaiwan.com/util/moninfo.shtm and send me back the output. I'm trying to see if my EDID has been flashed wrong or if this is a common case with these monitors. It seems like Windows isn't as picky with the EDID data, but OSX is.
Code:
Monitor
  Model name............... LCD QHD 1
  Manufacturer............. VMO
  Plug and Play ID......... VMO1091
  Serial number............ 110503_3
  Manufacture date......... 2011, ISO week 18
  Filter driver............ None
  -------------------------
  EDID revision............ 1.3
  Input signal type........ Digital
  Color bit depth.......... Undefined
  Display type............. RGB color
  Screen size.............. 600 x 340 mm (27.2 in)
  Power management......... Active off/sleep
  Extension blocs.......... None
  -------------------------
  DDC/CI................... Not supported

Color characteristics
  Default color space...... Non-sRGB
  Display gamma............ 2.20
  Red chromaticity......... Rx 0.653 - Ry 0.334
  Green chromaticity....... Gx 0.300 - Gy 0.620
  Blue chromaticity........ Bx 0.146 - By 0.050
  White point (default).... Wx 0.313 - Wy 0.329
  Additional descriptors... None

Timing characteristics
  Range limits............. Not available
  GTF standard............. Not supported
  Additional descriptors... None
  Preferred timing......... Yes
  Native/preferred timing.. 2560x1440p at 60Hz (16:9)
    Modeline............... "2560x1440" 241.500 2560 2608 2640 2720 1440 1443 1448 1481 +hsync -vsync

Standard timings supported

Report information
  Date generated........... 2/22/2013
  Software revision........ 2.60.0.972
  Data source.............. Real-time 0x0100
  Operating system......... 6.1.7601.2.Service Pack 1

That's my 27qd.

This little app also had info from previous monitors I had hooked up. I noticed they have a lot more data than the 27qd. i.e. the supported refresh rates.

I'm pretty sure it's generally known these displays don't play well with macs. The ones with displayport (2720md) might?

Also, the monitor whining....are you sure its the monitor and not the power brick? Worth checking.
Quote:
in all fairness it's the same indentical monitor apple uses, you shouldn't be having issues. feel like it's something wrong within your installation of osx. especially if it works in windows, but yet again when it comes to anything mac...i have no clue as most people on this forum wouldn't.
Same panel as Apple Display but that's where the similarities end. The EDID is incredibly bare compared to other monitors I've used. Windows doesn't give a **** tongue.gif but OSX seems to care.
Edited by kabes - 2/22/13 at 7:31am
Galactica
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 3770k @ 4.4GHz Asus P8Z68-V PRO GEN3 EVGA GeForce GTX 680 SC+ Corsair Vengeance 16GB DDR3-1600 
Hard DriveHard DriveCoolingMonitor
Samsung 840 500GB SSD Seagate 3TB, 3x2TB Hitachi Noctua NH-D14 Crossover 27QD 27" 2560x1440 IPS 
PowerCaseAudioAudio
OCZ Z-Series 1000W Corsair 600t Black Asus Xonar Essence STX Little Dot MK III Headphone Tube Amplifier 
Audio
Sennheiser HD 650 headphones 
  hide details  
Reply
Galactica
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 3770k @ 4.4GHz Asus P8Z68-V PRO GEN3 EVGA GeForce GTX 680 SC+ Corsair Vengeance 16GB DDR3-1600 
Hard DriveHard DriveCoolingMonitor
Samsung 840 500GB SSD Seagate 3TB, 3x2TB Hitachi Noctua NH-D14 Crossover 27QD 27" 2560x1440 IPS 
PowerCaseAudioAudio
OCZ Z-Series 1000W Corsair 600t Black Asus Xonar Essence STX Little Dot MK III Headphone Tube Amplifier 
Audio
Sennheiser HD 650 headphones 
  hide details  
Reply
post #5076 of 6483
@Kabes - thanks for running that for me. Everything seems to match up except for 'Input Signal Type', although that may be due to the fact that I'm using a mini displayport to dual link dvi adapter. My 'Input Signal Type' is 'Not Defined'

Another difference that I noticed between this and my Apple Thunderbolt display is the 'Color Bit Depth'. the 27qd comes back as 'undefined' and the thunderbolt display shows '10 bits per primary color'

I'm not sure if this may be the trigger, but like the video shows, it comes on for few seconds and then turns off. It's like it's losing the signal or something. I wasn't sure if somebody else has seen the same thing on a PC and has figured out a solution. My gut is that it is a Mac Driver issue for the graphics card. I called them yesterday and after a lot of troubleshooting, they basically went on to tell me it is an issue with the display (which I figured they would say).

@Descendant - I actually have to use PC most of the time, but my job forces me to use Mac as well (software/web developer) so that's why I need a Mac, so I can use both. As for the installation of osx, it's a fresh install, I just got the Mini. I'm using another Thunderbolt display, which I love, but after seeing these monitors, I didn't want to fork out the extra $500 for another one (although all the time I spent on this I probably should have just bought another)

Again, if anybody has any ideas, they are greatly appreciated, and if not, this monitor is probably going on ebay unless anybody can find a use for it (checked out pixels in bootcamp, and it looked perfect)
post #5077 of 6483
tell your job you can software develop and do web base development on a pc just as good biggrin.gif

thankfully I work for a software company that sells to U.S. manufacturing industry were macs are hated and also useless! for people who are in design and stuff though, works great I guess.

don't get me wrong, people LOVE their macs, but you are gonna pay since they have 600% markup on everything. I'm just happy I use the same panels they use cause crossovers are awesome.
post #5078 of 6483
Quote:
Originally Posted by Descadent View Post

tell your job you can software develop and do web base development on a pc just as good biggrin.gif

thankfully I work for a software company that sells to U.S. manufacturing industry were macs are hated and also useless! for people who are in design and stuff though, works great I guess.

don't get me wrong, people LOVE their macs, but you are gonna pay since they have 600% markup on everything. I'm just happy I use the same panels they use cause crossovers are awesome.

Well, I work for myself so it would be easy to, but the problem is that I do get work that forces me to work on a Mac (iPhone development). That's why, instead of having two computers, I can do both with one.

It just bugs me that it's not working.
post #5079 of 6483
Another thing to throw out there:

This Mac Mini (Intel HD 4000) shows 768MB of VRAM, but under Bootcamp, it shows 2025MB (shared memory). Would the 'lack' of memory cause the shutting off and on symptoms?
post #5080 of 6483
just ordered one of these

I got a samsung 950d 120hz i like the glossy screen so im hoping this looks just as good

http://www.ebay.com/itm/CROSSOVER-27Q-LED-High-Resolutio-n-2560x1440-QHD-DVI-D-Dual-S-IPS-27-Monitor-/110867210291?pt=Computer_Monitors&hash=item19d0336033
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