Display is shutting down/not responding after a certain time

Hi guys,

My Thunderbolt Display which I purchased shortly after it's announcement back in 2011 is playing really weird recently. I'm using it on two machines: my MBP and a Windows PC (yes, I got it working, can even play games with decent performance). Switching between both machines on a daily basis stressed the cable a lot, so the connector is kinda broken. However it works most of the time.

The bigger problem is: After using the display on both machines for a certain time, it completely freaks out. On the Mac it's going black without disconnecting, it is still registered by OS X. On the PC it either switches between resolutions (see this video https://www.youtube.com/watch?v=cCNNfYJA...), or it disables all connected peripherals.

Rebooting the PC and/or the display by unplugging it, helps most of the time for the next few minutes. Sometimes even hours. However working on it is kinda nerve-racking as you can imagine.

After talking to Apple Support, they send me to a local Certified Service Provider who took a look into it. They now offer a repair for ~€1070, which is even more than the €999 I paid back in 2011 for the brand new one! They say the LCD panel must be replaced!

Does somebody in this forum had experienced similar problems? Is is enough to replace only the logic board, not the complete panel?

TIA,

-Mario