So far, I've tried cleaning the contacts with rubbing alcohol. This made them more visually attractive, but did not solve the problem.

Second, I tried using another macbook pro, but it had the same issue.

I've noticed that the thunderbolt connector heats up significantly when it's in use. I'm wondering if there's a heat-related issue that could be causing a broken connection in the electronics inside the connector. Any thoughts?

⟐ Commented January 06, 2025 at 8:33 MST

Hi guys,

My Apple Thunderbolt Display has a stain from inside.

How I can fix it? I really believe it's on the glass as I took a screen shot of this area and the scree shot show pretty clean I mean, no stain at all. Does it make sense?

I'm afraid to remove the glass before to be 100% sure.

Tks a lot,

⟐ Answered October 06, 2021 at 3:11 MST

After many times unplug the power cable and plug it in again, the picture came back. Unfortunately, it disappears after 30 minutes and does not come anymore. The picture was good, no mistakes.

What could it be? Power cable to the iMac or power supply?

Has anyone else had this problem and how did you fix it?

What would be the most sensible to replace?

Many Thanks

⟐ Commented April 23, 2020 at 16:17 MST

⟐ Commented September 13, 2018 at 6:55 MST

⟐ Answer accepted October 16, 2015 at 4:45 MST

⟐ Answer edited August 31, 2019 at 6:04 MST

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

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

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

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!)

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

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

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

Old at the top, replacement part below

Assemble in reverse order then you should be back working again

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

Regards

⟐ Commented August 19, 2022 at 12:50 MST

I am trying to find the part number to buy the cable assembly, so that I can use it.

Thanks.

⟐ Answered April 29, 2020 at 6:22 MST

⟐ Commented May 18, 2016 at 15:34 MST

A friend have a problem with his 27" Thunderbolt display. Is it really annoying buzzing sound. My first guess would be the power supply??

The display in functioning OK, but that noise is killing the entire office.

How is the front glass attached? Glue? Can't see that in the break down guide.

Anyone else seen this?

Thanks

Here is a video of the issue.

YOUTUBE Video

⟐ Commented September 25, 2023 at 15:41 MST

⟐ Commented November 06, 2022 at 14:50 MST

What works:

• Magsafe charging works.
• The internal fan is running, and since it’s getting power and signal from the logic board, I reckon the logic board is not entirely dead.

What doesn’t work:

The display, USB etc is not recognised by the Macbook Pro. The display does not show any kind of image. The computer doesn’t even react (i e flicker) when the TB cable is inserted/pulled out. This MBP works perfectly with other Apple displays.

My questions:

1. Any tips on where to get hold of a Thunderbolt 2 cable to see if the internal one is bad? I don’t want to spend 25-30 EUR on a cable if that is not the issue.
2. If anyone has a replacement glass, I am interested in buying..
3. Is there any kind of fuses or similar safety feature that would cause the logic board to not power up?
4. Any tips on troubleshooting the logic board further?

I successfully repaired the display!

The problem was the All-in-one-cable.

I suspected the cable after visually inspecting the PSU and logic board, which looked fine. I also measured correct voltages coming from the PSU, and also seeing that the logic board spun up the fan, so it seemed to be at least somewhat functional.

The AIO cable was 25 EUR from eBay and the display now works perfectly!

⟐ Commented July 26, 2022 at 22:49 MST

what could i do????

⟐ Commented March 06, 2022 at 10:52 MST

My setup

[MacBook Air] ---- [Thunderbolt Display] --- [Thunderbolt drive] --- [Cinema Display]

with a USB drive and Ethernet plugged into the back of the Thunderbolt Display

Already tried

• Initial thoughts were that the cable was faulty. But then I noticed Ethernet came on, the USB drive was mounted, Thunderbolt drive was mounted and after a reboot the Cinema Display also come on. Obviously, the cable was working just fine.
• Second thought was that I had neglected to reconnect some cables that connect the LCD panel to the main logic board. I checked. Seemed just fine.
• Third was that perhaps the cable serial number was somehow tied to the main logic board. So I put the old cable back. Still no screen.
• Tried to connect the screen using an external Thunderbolt cable, everything worked equally well but still no image on the screen.
• Tried 30+ seconds and 3+ hours unplugged as a 'reset' of the screen. No change.
• Rebooted my laptop. No change.
• Plugged the Thunderbolt Display into the drive and then into the MacBook, so change the sequence of devices. No change.
• System Information reports under "Thunderbolt" the whole chain of devices, but under "Graphics/Displays" shows only the internal screen and Cinema Display.
• Using the newly-purchased cable as an external Thunderbolt cable works just fine too.

Question

Does anybody have any suggestions on what to try next?

Does the logic board go into some kind of lockdown mode when replacing the cable?

Are there more than 3 connecting flat cables + ground connection between the panel and the main logic board?

Although there is no reason to assume it has been, how do I test the LCD panel to still function given all these flat cable connectors?

Note: There are no Apple Stores here. Apple Authorised Service providers are no help. They suggested replacing the cable and the panel at a cost that is nearly the same as buying a new screen.

⟐ Commented March 04, 2021 at 6:40 MST

⟐ Answered October 14, 2020 at 5:06 MST

The powerboard the display was plugged into is also dead - no response on any outlet. All other devices plugged into the powerboard are OK.

What do you think the chances are that the display circuitry survived? Is it worth spending the money on a new power supply to test if it works?

Or, at least spending the money on the suction caps to tear the display down and visually inspect? Could you even tell from a visual inspection if the silicon got fried?

Thanks for your advice in advance.

⟐ Commented January 14, 2020 at 22:21 MST

I have a new Macbook but also a 2012 Thunderbolt display. The Macbook only has a USB-C port and I was wondering if anyone has come across people replacing the Thunderbolt display's Mini Display cable with a USB-C one.

Is this even possible?

Any Mini Display-to-USB-C adaptors were very quickly (and suspiciously...) discontinued shortly after they were released in 2015.

Any advice or info would be much appreciated.

Henry

⟐ Commented June 04, 2020 at 5:29 MST

I am currently working on Mac Mini and when it feels hot will put it in sleep mode till it cools down after an hour.

Can anybody help me work out what is going on as I think it it is just a fan and temperature sensor, but I would appreciate any help from the “hit it with a hammer “ brigade.

FYI - I’m a newbie to Apple Mac’s

p.s The definition of an Engineer, is a man with a hammer in his hand. LOL

⟐ Answer edited July 23, 2023 at 17:15 MST

For the past week the monitor has been starting to switch on and off intermittently, often but not always when this happens the cable is very hot and sometimes the bottom of the screen too (without connecting anything to the hub this doesn't seem to overheat).

When the problem first appeared I tried upgrading the mac to 12.4 (from 12.3) thinking it was that, although it seems to have only gotten worse since then.

I'm not sure it's the Thunderbolt Display cable's fault that's causing these problems as I've tried using it on a 2011 macbook pro without then using the adapter and it doesn't seem to be causing any problems.

At this point it could be the adapter, like the cable or something else like a faulty component or firmware issue.

Does anyone have any ideas to solve the problem or at least identify the cause?

⟐ Commented July 04, 2022 at 2:52 MST

If you want to say buying a dell monitor, please ignore this request.

This symptom happened a while ago and I really tried to figure out why, but I couldn’t find out. Btw, thanks a lot someone who created this forum! I got a lot of knowledge.

So, the problem happens just after few minutes later. When I unplugged it and connected it again, it sometimes fixed. However, it never continue more than 30 minutes. I already tried to connect display from another thunderbolt from back panel instead of all-in-one cable. It works but never continued neither. I replaced the All-in-one cable and there was no change. I replaced the power supply unit with my another apple cinema display(not Thunderbolt display), but it didn’t work. I found out the PSU is the same with the Cinema display.

The things that I can try from now is

1. replacing logic board

2. AC Power Inlet.

Can anyone succeed to fix 27” Apple Thunderbolt Display ever?

I reached out to local repair shop, but they asked me around $400 for fix.

Please help me!! I don’t have money for buying $5-6000 monitor!!!!

⟐ Commented May 13, 2021 at 16:13 MST