Repair/convert Magsafe to Magsafe 2 with new DC in Board?
I have a MacBook Pro 13" unibody mid 2009 model A1278. I have two non-functioning 60W power supplies that had the MagSafe "T" type connectors that have failed (and have since been cut off). Both units are labeled with output of 16.5v=3.65A I have tested both units using the same 3-prong wall-to-power-brick cord by testing on the two bare wires (the inner white jacketed and the braided shield).
The first is the original Apple one that came with my laptop. It tests at 6.67 DC volts out which seems close enough according to other posts on Q and A forums here.
The second unit is a 3rd party vendor (unknown) marked only as "replacement AC Adapter" and "Model No. S165365." (Which seems to be a common thing according to my searches.) It tests at 16.83 DC volts out.
Also, my DC in Board connectors are fried.
I would like to repair the two MagSafe power cords by buying just the replacement cords but I do have to replace the DC in board.
So, my questions are:
1) is the Apple power brick output of 6.67 DC O.K.?
2) is the off-brand power brick output of 16.83 DC O.K.? (I am guessing so because it seems to approach that of an 85W? and I understand the MacBook Pro will adjust the draw accordingly?)
3) is there any advantage of the newer "L" type over the "T" type that I originally had or is it just personal preference?
4) since there is a MagSafe to MagSafe 2 converter (cord) available, can I convert the DC in Board to MagSafe 2 and repair the MagSafe power brick connector cords to MagSafe 2?
5) if so, is there any reason/advantage in doing so? Or should I just stay with older style MagSafe? (Is the only thing different in the MagSafe 2 is that it is thinner to fit into the newer models?)
Yes I know I can buy new complete power adapters pretty cheap but that is what I did to get the second one and it died pretty fast. AND, I have very limited funds right now but am very capable of the repairs (planning on just splicing the new wires the the old ones and not popping the bricks open.)
Lastly, have used your website a LOT! for this research as well as having already replaced the battery in this unit and an older MacBook about 6-7 years ago. So thank you for the help already and in advance for any additional help on this project.
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