Q: Thunderbolt Display turns off randomly

Last question How long since its been fixed..? No issues since then..? and does the new board get covered under a 1 year warranty..?

Last question How long since its been fixed..? No issues since then..? and does the new board get covered under a 1 year warranty..?

It should be covered under the 1 year warranty, but you'll have to check with apple.

it's only been a couple weeks, but no issues since i got it back.

OWC Larry, how do I ping you? I am having the TB blackout problem with OWC RAM and a Macbook Pro. I'd like to contact you about this... Thanks.

what did you reinstall, if I may ask? I'm having this problem with a Macbook Pro, so doesn't seem like there's anything to reinstall....

Its been working great after using the external thunderbolt cable from Apple., no issues for over a day..!

Ok i swapped out my ram for the orginal Samsung memory and I have not had a single flash all day. Not sure what to do at this point as 4GB is not enough for me and don't know wheere to get OEM apple memory cheap.

And you really don't want cheap RAM - PNY is perhaps the cheapest and the worst. OWC and Crucial both make excellent Mac RAM, OWC being a bit higher but tested more rigorously with Apple products,

Clinton

I have alsways used Crucial RAM and never had any issues.

This appears to be my problem as well. I have an MBA 2013 version connected to a new TBD. It worked ok for a few weeks then today started to go black randomly. I have a hard drive connected to a fire wire port (powered from the port) and an Ethernet connection. I tried removing the HD but no cjange, then I tried pulling out the ethernet  and since then I have had no problems (30 minutes only - so early days yet).

When you consider that the bus runs at 10Gb/s and the ethernet data as well as everthing else has to be shoveled accross the link, it is not surprising that there can be noise or timing issues, expecially as the cables carrying this huge bandwidth are also basically cheap. When I was studying microwave engineering 25 years ago these data rates would have been considered totally amazing and only used in the realms of radar and satellite comms, I know I am getting old but as Scotty used to say, "Y' canna change the laws a' physics captain"

I just got my 27" TBD back from Apple and they replaced the cable then 3 hours later I got my blank screen...   I disabled the GPU switching and unplugged my ethernet cable.  Fingers crossed!

I re-inserted my ethernet connector after an hour without problems ( using a newer cable), and it seemed to be ok but I didn't run it for very long. I will replace the CAT-5 cable with a CAT-6 cable tomorrow and see what happens.

In most EU countries there is a 2 year warranty proscribed by law and apple must comply. Certainly in Germany you can get any apple product repaired within the 2 year period free of charge.

Maybe Denmark is the same.

See here: http://www.apple.com/legal/warranty/

I am in the US so here it's only 1 year and I bought it 1.5 years ago.  I just paid $60 to replace the cable that did absolutely nothing.  Also saw some threads about people replacing the memory?  Did that work?  I did that upgrade to my MBP awhile ago and have only seen these issues recently?

When you are working with really high frequency comms. then the system is usually well shielded (like a cable) and /or physically small (mobile phone). I suspect that the Thunderbolt interface is so fast and the system so big that the safety margins in a total Thunderbolt system are small. The errors in the whole serially connected system add up and when the total error is too great the system falls over. In a standard TBD / MBP oder MBA setup you have the motherboard in the computer which is well controlled, then the connector and cables (which are poorly controlled) and then the interior of the display and the interconnections there including the interface to the GBit Ethernet - which may or may not be well shielded - and then the further Thunderbolt daisy chain of connectors and cables.

The whole thing is like a satellite Link-Budget where small deteriorations in any of the components will cause failure of the whole system even though the component hasn't really become much worse at all and probably isn't always to blame! In this situation replacing the components is really a hit or miss affair. Probably the cables and conectors are always a good bet, but memory and ethernet peripherals could also be to blame.

This is really why no one has ever tried to do these bus speeds before with long cables and lots of interconnects , it is just very difficult to achieve in mass production at low cost.