Delete comment from: Ken Shirriff's blog
Thanks Ken, very helpful. Between this and rlanceread's equally thorough You Tube tutorial I had no trouble taking apart my defunct Magsafe 1 head.
The problem having been, as so many other people have found, that some of the pogo-pin springs were no longer strong enough to push all 5 pins out through that thin white plastic block. So, with the block removed, I VERY carefully applied silicone adhesive to the base of all 5 pins (about 1/16" deep) using a magnifying glass and a toothpick; silicone being an excellent insulator when cured, I should add! I then reinstalled the block, and used small needle nosed pliers to make sure that all 5 pins were pulled-out as far as they would go. Finally, I gently cleaned the pins and the block with some Q tips, one end dry, the other damp with soapy water.
After waiting the recommended 24 hrs for the silicone to cure, I reassembled the head, and -- TA-DA!! -- on came that reassuring little green...then amber... light. No way of knowing how long it will hold up, but at least long enough, to get a back-up head, I'm hoping. Though I plan to splice it onto the existing cord rather than going through the hassle of prying open the power supply and soldering the 2 contacts (also on You Tube).
Let's just hope that Apple manage to finally resolve this ongoing and extremely frustrating problem with Magsafe 3!
Feb 26, 2014, 9:44:17 AM
Posted to Teardown and exploration of Apple's Magsafe connector

