Hi everyone.
I have an annoying problem with a Mac Book Pro retina 2016. Card Model 820-00281-A.
I had damaged the flat cable that connects the touchpad to the motherboard. nothing serious except that I connected the damaged flat to try if it worked. Unfortunately, in addition to not working (obviously) the J4501 connector went up in smoke.
The Mac now turns on but the touchpad does not work (obvious), the keyboard does not work too and the fans run at maximum speed.
I had to remove J4501 because it was melt and some pins were bent.
After that I start measure some point :
I checked were pins 25 and 27 burn PP3V3_S4_TPAD but no short , and resistance to GND is 653 ohm.
No short even in pins 21-23PP5v_S4_TPAD_CONN , where resistance to GND is 365 ohm.
I found some issues ( I think at least) in PP3V3_SUS related resistors:
Many of these got strange values :
R1420 : it should be 10K , but I measure 8.25K
R1461: it should be 10K , but I measure 6.40K
R1515: it should be 100K , but I measure 46.5K
R1525: it should be 100K , but I measure 80.1K
I'm sure about these resistance value aren't good but I dont understand why.
After that , following the schematics I found capacitors C1700 , C8500 and many others shorted to ground. They are all related to PP1V0_SUS.line
Now , not beeing a pro but I need the help of someone who can understand this values.
I attached schematics and Boardview files.
TY in advance!
I have an annoying problem with a Mac Book Pro retina 2016. Card Model 820-00281-A.
I had damaged the flat cable that connects the touchpad to the motherboard. nothing serious except that I connected the damaged flat to try if it worked. Unfortunately, in addition to not working (obviously) the J4501 connector went up in smoke.
The Mac now turns on but the touchpad does not work (obvious), the keyboard does not work too and the fans run at maximum speed.
I had to remove J4501 because it was melt and some pins were bent.
After that I start measure some point :
I checked were pins 25 and 27 burn PP3V3_S4_TPAD but no short , and resistance to GND is 653 ohm.
No short even in pins 21-23PP5v_S4_TPAD_CONN , where resistance to GND is 365 ohm.
I found some issues ( I think at least) in PP3V3_SUS related resistors:
Many of these got strange values :
R1420 : it should be 10K , but I measure 8.25K
R1461: it should be 10K , but I measure 6.40K
R1515: it should be 100K , but I measure 46.5K
R1525: it should be 100K , but I measure 80.1K
I'm sure about these resistance value aren't good but I dont understand why.
After that , following the schematics I found capacitors C1700 , C8500 and many others shorted to ground. They are all related to PP1V0_SUS.line
Now , not beeing a pro but I need the help of someone who can understand this values.
I attached schematics and Boardview files.
TY in advance!
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