Chosen Solution

My MBA magsafe gets super hot (to the point it can burn your finger). I’ve changed a few adapters and I/O boards, but no big difference. The I/O board usually last a few months, then it slowly stops working, probably because the heat. Anyway, I bought a new laptop, but would like to use the old MBA as a TV computer (watch movies, youtube, etc. since I do not have a smart TV). But I’m not willing to buy a new I/O board every few months. I have the following 3 ideas:

  1. directly solder the power supply to the I/O board, this should work, I’m not sure if I’d get rid of the overheating though
  2. remove the I/O board and directly connect the power supply to the motherboard. I’m not sure if the unit would even work then.. since there are many wires connecting the I/O board and the motherboard.
  3. remove the battery and connect the power supply instead of the battery. What choices do I really have?

Well, I’ve got some bad news for you. The reason the I/O board (MagSafe connector) is melting is the charging logic on the logic board is blown so instead of controlling the current (limiting it) it’s allowing all of the power to go through. In addition your battery is likely bad as well given its age. MacBook Air 13" (Mid 2011) 1.7 GHz Logic BoardMacBook Air 13" (Late 2010-2017) BatteryMacBook Air 13" (Mid 2011) I/O Board So, if you defeat the MagSafe connector the logic board will then overheat and will get to a critical point and burn up (could start a fire). I would either put the effort in fixing it correctly or toss it and not try to make something out of it. As the old expression you can’t make a silk purse out of a sows ear - Sorry ;-{