I have an Apple A1407 freestanding 27" monitor to repair for a friend. It has what seems to be a common problem with the SMPS in that it makes an irritating noise. I can find many comments on the net about this issue but no technical posts. The monitor will not power up unless connected to a Macbook with the Thunderbolt cable, so I removed the PSU and loaded it up beyond spec on the bench but it remained silent. Hopefully I can borrow a Macbook, but the monitor is a real pain to dismantle and operate with the heavy screen lifted up. The interconnects to the screen are really short so it cannot be moved more than a few centimetres, with the monitor lying on its back.
Has anyone any experience with this issue?
I hope that I can identify which wound component is the cause, and may be tempted to make a 'dam' and pot it in epoxy.
Any comments, or info about jigging it to power up without the Thunderbolt connection?
Regards, BT