Hello,
First, I would like to thank everybody here and how grateful I am of being here and posting here my first thread.
I'm new to fixing MacBooks in micro soldering level and I'm trying my best on learning and upping my skills.
So here it goes;
I received couple of days ago a 820-00281 that turns on normally but w/ high fan spin and slowness. I did the visual inspection and found liquid residue near U3500, U5850 and a bit near U3906.
I cleaned it properly and found C5850 damaged and Pin #1 on U5850 also corroded so it wasn't getting the proper power.. after removing U5850 and cleaning it and resoldering it w/ a good cap the computer posted with normal fan spin and normal speed.
One thing I noticed after all this is one of the USB-C ports was not working properly; it was charging the MacBook Pro but plugging in a dongle w/ USB flash did not work.. they seemed to have not get power..
Now here's the funny part
I was measuring voltages around the board to see what's causing the issue and I've mistakenly shorted C3201 w/ R3032 (I know, epic), a small spark came and computer got stuck at 5v after this.. and I have no idea what had gone wrong or where to start from.
PP20V_USBC_XB_VBUS is present at 5v
PP3V3_UPC_XB_LDO is not present and testing C3208 pin 1 is shorted to ground
I will happily give any information required
And I am most grateful for any help offered
First, I would like to thank everybody here and how grateful I am of being here and posting here my first thread.
I'm new to fixing MacBooks in micro soldering level and I'm trying my best on learning and upping my skills.
So here it goes;
I received couple of days ago a 820-00281 that turns on normally but w/ high fan spin and slowness. I did the visual inspection and found liquid residue near U3500, U5850 and a bit near U3906.
I cleaned it properly and found C5850 damaged and Pin #1 on U5850 also corroded so it wasn't getting the proper power.. after removing U5850 and cleaning it and resoldering it w/ a good cap the computer posted with normal fan spin and normal speed.
One thing I noticed after all this is one of the USB-C ports was not working properly; it was charging the MacBook Pro but plugging in a dongle w/ USB flash did not work.. they seemed to have not get power..
Now here's the funny part
I was measuring voltages around the board to see what's causing the issue and I've mistakenly shorted C3201 w/ R3032 (I know, epic), a small spark came and computer got stuck at 5v after this.. and I have no idea what had gone wrong or where to start from.
PP20V_USBC_XB_VBUS is present at 5v
PP3V3_UPC_XB_LDO is not present and testing C3208 pin 1 is shorted to ground
I will happily give any information required
And I am most grateful for any help offered
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