HI all,
new member here, so hi to the community.
I have a problem with a MacBook pro 13", A2251, board 820-01949, that is nagging me.
The macbook had liquid spill and didn't work at all when i received it.
I was able to get it back working by replacing a shorted cpu mosfet and a resistor on that line.
It worked good after that with one fault: 3 usb ports worked as expected, one port didn't work at all, no voltage draw, nothing.
The USB-on-board connector and the small usb-board of that port where both defective, so I replaced the on-board connector and used a new usb-board.
Result was the same, 3 working ports, one completely dead.
So I tried the next thing that came to mind, replaced the CD3217B12 connected to the faulty port, U3100_W in my case.
Unfortunately, since then, the board doesn't work at all.
The 3 usb-ports that worked before only draw 5V and the port that was dead before is still completely dead.
I replaced CD3217 2 more times, with chips from different sellers, but still the same.
I checked the resistors/capacitors around the area but couldn't find a suspicious reading.
I thought about changing ISL9240 but the area looks clean with no obvious defects.
Does anyone here has an idea where i should look at or what might be the problem?
Thanks a lot
Ongo
new member here, so hi to the community.
I have a problem with a MacBook pro 13", A2251, board 820-01949, that is nagging me.
The macbook had liquid spill and didn't work at all when i received it.
I was able to get it back working by replacing a shorted cpu mosfet and a resistor on that line.
It worked good after that with one fault: 3 usb ports worked as expected, one port didn't work at all, no voltage draw, nothing.
The USB-on-board connector and the small usb-board of that port where both defective, so I replaced the on-board connector and used a new usb-board.
Result was the same, 3 working ports, one completely dead.
So I tried the next thing that came to mind, replaced the CD3217B12 connected to the faulty port, U3100_W in my case.
Unfortunately, since then, the board doesn't work at all.
The 3 usb-ports that worked before only draw 5V and the port that was dead before is still completely dead.
I replaced CD3217 2 more times, with chips from different sellers, but still the same.
I checked the resistors/capacitors around the area but couldn't find a suspicious reading.
I thought about changing ISL9240 but the area looks clean with no obvious defects.
Does anyone here has an idea where i should look at or what might be the problem?
Thanks a lot
Ongo
Thanks!
Comment