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820-2330

macrumors newbie
Original poster
Oct 21, 2016
1
0
Hello everyone. Need some help. I've done stupid thing to my Mac. To make story short, powered Mac with reverse polarity. Have two power adapters the original one gone bad, two pins ( grounds) stack at the bottom and didn't make connection with Magsafe. Got the cord from second adapter and soldering it with wrong polarity. Now Mac starts on battery only. Purchased new original adapter and Magsafe. No green light. SMC bypass works, computer runs at full power. Any idea where to look first. Missing 5V rail but I think it should be presented if computer running. 1- wire has SMC_BC_ACOK working around 3.2V, 16.5V on pin 6 of Q6910, SYS_ONEWIRE <BI> Q6920 pin 6 3.4 V the rest of the pins of this chip are 0V.
Please help with any information. Will provide all readings needed to find out what is wrong.
Thanks for your time in advance.
 
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