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CrossOver 27Q LED/LED-P, 27M LED, & 2720MDP GOLD LED Monitor Club - Page 234

post #2331 of 6483
Have had my Crossover 27Q for a few days now - pixel perfect, and no noticeable back-light bleeding. Just upgraded from a woefully old 1600x1200 monitor. Nigiht/Day
post #2332 of 6483
Ok finally got my Crossover LED-P today! I took the time to create an album with pics of
  1. Shipping info
  2. Packaging
  3. Contents
  4. Backlight bleed
  5. Bleed vs 6mo 2ms TN display
  6. Side by side comparisons
  7. Extreme angles
  8. Pics of game
  9. Bezel measurements


All in all it took 2.5 days, and i have 0 dead pixels with very minimal backlight bleed - it is comparable to my 6 month old 24" ASUS VS248H 2ms led backlit monitor (which is also VERY good for a TN display)

Ordered from Green-sum (non-perfect pixel), going to be giving him a positive review - unfortunately he did not read my message to mark it as a gift frown.gif Had to pay $50 extra in taxes or whatever

Check em out here if you like http://imgur.com/a/p7pc2
Edited by jerrolds - 8/22/12 at 9:43pm
post #2333 of 6483
Ok so after reading a lot i decided to go with the crossover thumb.gif

From which seller do you recommend buying ????? I


I know its a gamble with everyone but i want to know who will step up if the product is defective ????
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X99 Hackintosh
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post #2334 of 6483
Quote:
Originally Posted by kwando View Post

Hey guys,
I've had my Crossover for some months now. Absolutely ADORE the monitor. I got lucky and it's a pixel perfect from BCC.
Recently however, I've started noticing the brightness fluctuations. Do we have a general consensus on what causes this yet? It may just be my eyes but I notice it happens more when I have large white backgrounds up such as from websites etc.
Apart from that though, this has definitely one of the most satisfying tech purchases I've made my entire life, and I owe all the great advice to the members of this forum.
Cheers!

Well ...now it just got interesting.

Since my initial post about the brightness fluctuations things have become progressively worse, and today, the screen won't even display an image anymore!

The blue led indicating power is still on, but the screen remains black. It all degenerated so quickly!

Does anyone have any recommendations? I haven't had one single issue with the monitor till the fluctuations started a few days ago.
post #2335 of 6483
have you tried multiple dvi cables?
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post #2336 of 6483
Not yet, that's the next thing I'll do.

How likely do you think it's a cable related issue?

I've just ordered another power supply from ebay for troubleshooting too.
post #2337 of 6483
Kwando, refer to this - http://www.overclock.net/t/1076808/fir3chi3fs-new-indepth-capacitor-replacement-monitor-repair-tutorial

You may need to go through this route if the new power supply doesn't work. Good luck!
post #2338 of 6483
Cheers mate that's a very helpful thread you've directed me to.

I'll leave this as a last resort, if BCC won't send me a replacement.

I've done some basic soldering in the past but nothing like this haha.
post #2339 of 6483
Quote:
Originally Posted by shremi View Post

Ok so after reading a lot i decided to go with the crossover thumb.gif
From which seller do you recommend buying ????? I
I know its a gamble with everyone but i want to know who will step up if the product is defective ????

i recommend Accesorieswhole. I've bought 3 from them already and should get the other 2 tomorrow so we will see how those arrive. I've had nothing but great communication with emailing back and forth. They are more expensive but they sell A panels and have less than 3 pixel policy and give you 1 year warranty. That's worth the extra over other sellers to me.

Others will say other sellers that are good too but either way monitor is great.
post #2340 of 6483
Kwando, you have a pm.

So my repair was (mostly) a success. The only issue now is that the backlight never turns off (I'd rather have that issue than never turning on!). Even after consulting with some of my Computer Engineering buddies, we can't figure out why this is happening. I plan to wire a switch inline with the power to the led driver board, and will simply have to turn the monitor on with two the original power button and the backlight switch.

I plan on adding a heat sink to the mosfet, and a small fan in the monitor housing to prevent this from happening in the future.

I do not recommend this repair to anyone with little soldering experience or with a cheap soldering iron. Better yet, I do not recommend anyone attempt this repair- you can very easily damage your monitor!

Here are some pictures of the repair:

Warning: Large Images! (Click to show)
This picture shows the mosfet that was replaced. When it overheated, it damaged the PCB around it, and took one of the small traces with it. Also, all copper under the mosfet was stuck to the mosfet upon removal, hence the ulgy soldering job on the top. Because the trace was no longer there, I had to run a wire from the foot of the mosfet to a resistor where the trace connected. (Dime included for scale)
We7am.jpg

This shows how hot the mosfet got! (Back side of the board!)
Nx49x.jpg

J8n2M.jpg
29Ghb.jpg
gpoOk.jpg


This is the video cable. Be very VERY careful with this when disassembling the monitor. It is very cheap, and very fragile, but essential to the operation! Use the wings on the connector for removal. (2nd pic)
LfPLa.jpg
lhfXQ.jpg


My soldering iron. DO NOT ATTEMPT THIS WITH A CHEAP IRON! You WILL damage the board!
3c46w.jpg
    
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