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

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27" Thunderbolt intermittently gets no power at all

Hi,

After upgrading to Catilinia, one of my TBD’s will not power on at all. The magsafe cable has no power. I swapped power cables and tried multiple laptops. Sometimes after leaving it unplugged completely over night it will power on but as soon as i unplug the laptop it will not power on again.


Should I just swap the logic board and go from there?

Thanks.

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I would focus on the power supply Thunderbolt Display 27" Power Supplied Apple P/N 614-0487

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