Hi everyone,
I need your help with repairing this Macbook Pro. The fault is that the laptop does not power on. there are different current draw from the various USB ports.
It is worth mentioning that there is no liquid on the board after a visual inspection. below you can see all readings and info after some diagnostic.
There are also some thermal images uploaded in the thread.
What should I do next? any suggestions?
Thanks in advance.
Current draw:
USB port 1: 4.9V - 0.356A
USB port 2: 4.9V - 0.056-0.60A
When power connected to USB port 1:
F7000 - PPBUS_G3H - 12.30V (both pin 1 and 2).
Both U3100, U3200 and L6901 lights up on thermal.
Voltages near U3200:
C3208 - 3.254V
C3205 - 1.582V
C3200 - 3.311V
Voltage near U3100:
C3105 - 1.231V
C3108 - 2.813V
When power connected to USB port 2:
F7000 - PPBUS_G3H - 0.890V (both pin 1 and 2).
Only U3100 lights up on thermal.
C3208 - 0V
C3205 - 0V
C3200 - 0V
Voltage near U3100:
C3105 - 1.245V
C3108 - 2.904V
Readings around U3200:
C3208 - D:0.085 R:99.9 ohm
C3205 - D:0.511 R:1.002 Mohm
C3200 - D:0.366 R:1.600 Mohm
R3020 - D:0.000 R:0.01 ohm
R3205 - D:0.530 R:0.982 Mohm
R3208 - D:0.562 R:1.002 Mohm
Readings around U3100:
C3105 - D:0.070 R:81.7 ohm
C3108 - D:0.019 R:22 ohm
R2834 - D:0.086 (pin 1) 0.499 (pin 2) R:103 ohm (pin 1) 2.281 Kohm (pin 2)
R3108 - D:0.019 (pin 1) 0.568 (pin 2) R:22.1 ohm (pin 1) 1.001 Mohm (pin 2)
R3109 - D: 0.019 (pin 1) 0.565 (pin 2) R:22.1 ohm (pin 1) 1.001 Mohm (pin 2)
I need your help with repairing this Macbook Pro. The fault is that the laptop does not power on. there are different current draw from the various USB ports.
It is worth mentioning that there is no liquid on the board after a visual inspection. below you can see all readings and info after some diagnostic.
There are also some thermal images uploaded in the thread.
What should I do next? any suggestions?
Thanks in advance.
Current draw:
USB port 1: 4.9V - 0.356A
USB port 2: 4.9V - 0.056-0.60A
When power connected to USB port 1:
F7000 - PPBUS_G3H - 12.30V (both pin 1 and 2).
Both U3100, U3200 and L6901 lights up on thermal.
Voltages near U3200:
C3208 - 3.254V
C3205 - 1.582V
C3200 - 3.311V
Voltage near U3100:
C3105 - 1.231V
C3108 - 2.813V
When power connected to USB port 2:
F7000 - PPBUS_G3H - 0.890V (both pin 1 and 2).
Only U3100 lights up on thermal.
C3208 - 0V
C3205 - 0V
C3200 - 0V
Voltage near U3100:
C3105 - 1.245V
C3108 - 2.904V
Readings around U3200:
C3208 - D:0.085 R:99.9 ohm
C3205 - D:0.511 R:1.002 Mohm
C3200 - D:0.366 R:1.600 Mohm
R3020 - D:0.000 R:0.01 ohm
R3205 - D:0.530 R:0.982 Mohm
R3208 - D:0.562 R:1.002 Mohm
Readings around U3100:
C3105 - D:0.070 R:81.7 ohm
C3108 - D:0.019 R:22 ohm
R2834 - D:0.086 (pin 1) 0.499 (pin 2) R:103 ohm (pin 1) 2.281 Kohm (pin 2)
R3108 - D:0.019 (pin 1) 0.568 (pin 2) R:22.1 ohm (pin 1) 1.001 Mohm (pin 2)
R3109 - D: 0.019 (pin 1) 0.565 (pin 2) R:22.1 ohm (pin 1) 1.001 Mohm (pin 2)
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