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