MBP 13" + 27" ACD = Problem

[Konrad]

MBP 13"
(2011) Thunderbolt
OSX 10.7.5
2.8 GHz, i7, Crucial SSD 256GB, 16GB RAM
27" ACD
(2012) Thunderbolt

- TB connected causes the 27" ADC to go black intermittently (frequency depends on data load, typically every 15-25 min) for a duration of 0.5s - 2s. (all applications)
- Can be duplicated with other 27" ADC
- Works fine with Apple Thunderbolt double DVI adapter with 30" ACD (DVI)
- MBP logic board replaced by Apple - PROBLEM NOT SOLVED

Please advise.
Thank you

 

[duervo]

MBP 13"
(2011) Thunderbolt
OSX 10.7.5
2.8 GHz, i7, Crucial SSD 256GB, 16GB RAM
27" ACD
(2012) Thunderbolt

- TB connected causes the 27" ADC to go black intermittently (frequency depends on data load, typically every 15-25 min) for a duration of 0.5s - 2s. (all applications)
- Can be duplicated with other 27" ADC
- Works fine with Apple Thunderbolt double DVI adapter with 30" ACD (DVI)
- MBP logic board replaced by Apple - PROBLEM NOT SOLVED

Please advise.
Thank you

It's either the TB cable or the ThunderBolt display. Cable is cheaper to rule out. Logic Board has already been ruled out.

 

[Konrad]

It's either the TB cable or the ThunderBolt display. Cable is cheaper to rule out. Logic Board has already been ruled out.

The Thunderbolt ACD is most likely OK, as I was able to duplicate the exact same problem with two other Thunderbolt ACDs. All three tests were done via a built-in Thunderbolt cable within the Thunderbolt ACD.