27" display with 2560 x 1440 pixels resolution Thunderbolt & MagSafe cable attachments

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LM270WQ1 (SD) (B3) Controller board

I have troubleshooted this display and pinpointed the part pictured as the problem, I've confirmed it by replacing with a known good part and it restores the display to working however I am struggling to find a replacement part, where can I pick up a Controller board? does anyone have one spare even a faulty display with scratches, cracks or marks would do as this is a seperete piece

LG P/N 68700-0382A LG P/N 6870C-0382A

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or alternatively is there a component on these that is prone to going I could replace?

Update (09/22/2016)

So I repaired today and all is working well, it's not difficult, out with the old and in with the new, probably the most awkward part is getting the LG panel off the housing, be very careful not to pull on the connected cables or you run the risk of pulling of the surface mounted connectors

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So the back of the panel the area you are working on is at the top underneath that raised metal cover, there's lots of silver tape and black tape here and no matter how careful you are you will tear it (I did anyhow!)

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There's only 4 screws holding this on, one of which is covered by black tape

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Fold the cover away from you and let it stand up, the board is now held in place by the 2 conectors at the top with zif connectors, the LVDS cable and the 2 push out connectors, take care taking these out, the board should just lift away when these have been removed

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Part number to check which revision you have to order the replacement part

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Old at the top, replacement part below

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Assemble in reverse order then you should be back working again

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Any questions please ask and I will do my best to help :)

Regards

Answered! View the answer I have this problem too

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Very nicely done. This will help others ;-)

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Great. Im very interesting in How did you conclude that you would require a T board, or, What was the problem of the monitor?

Thanks

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Apple Thunderbolt Display 27-Inch Specs

Identifiers: Thunderbolt Display - MC914LL/A - A1407

http://www.everymac.com/monitors/apple/t...

I am finding nothing on this part number. Can you give a link?

It tried another number on the board (lm270wq1) and got results:

http://www.ebay.com/itm/Original-T-con-b...

http://www.ebay.com/itm/DisplayPort-Cont...

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That looks like it's the same board but a different revision, not sure on compatability, it's an LG part number and I found nothing myself bar a few images, certainly if you search for the panel p/n there is plenty of hit's but nothing in stock anywhere!

http://www.aliexpress.com/store/product/...

http://m.dhgate.com/product/lm270wq1-sdb...

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ok i've just found a few in stock going to reach out and see if they will ship to UK

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My part number is wrong, it's LG P/N 6870C-0382A

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I got the number I used off your picture. Here's where to get a NEW part for $55.00 using the new number you postedhttp://www.aliexpress.com/item/LM270WQ1-...

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So i've ordered a replacement part from AE, i'll post back when it arrives and report on results, I already know it's the board that's at fault but i'll post some pics for the benefit of other user's

Cheers Mayer :)

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I am confused. What was the problem you were having to conclude the board was the problem? I am having issues right now with my LCD screen(goes black randomly and don't want to come back) FaceTime camera working well, speakers too so is the LCD. No connectors were loose and I am getting picture on the display cause I can see it with a flashlight so definitively is a backlight problem, my question is what does this board do to see is something I should test before ordering a new LCD.

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Or could be the power supply

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Brian will be eternally grateful.
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