JdYoda
Member
Hello everyone.
Got this laptop yesterday, castomer says "mac doesn't charging and external usb drives can not be recognized"
Mac still powers on, everything works, exept usb-c potrs. With plugged in charger usb-c meter shows 5 volt steady on one of the ports, and 5 volt rebooting every 2 seconds on other port. No traces of liquid or corrosion on board.
I found out that PP3V3_UPC_XB_LDO is shorted. After changing U3200 (CD3217) both ports has stable 5 volts with no rebooting. Then i changed U2980. Now Im getting 20 volts, 0.05 amps, board not booting, PPBUS_G3H 12.2, SLPS2R/AWAKE signals present, PP3V3_S5 missing.
With battery mac still turns on, and external devices can be recognized now. But still not charging.
Changed U7000, Q7030/40, checked all resistors around u7000 and both CD3217, they are all fine.
I'd appreciate any advice
Got this laptop yesterday, castomer says "mac doesn't charging and external usb drives can not be recognized"
Mac still powers on, everything works, exept usb-c potrs. With plugged in charger usb-c meter shows 5 volt steady on one of the ports, and 5 volt rebooting every 2 seconds on other port. No traces of liquid or corrosion on board.
I found out that PP3V3_UPC_XB_LDO is shorted. After changing U3200 (CD3217) both ports has stable 5 volts with no rebooting. Then i changed U2980. Now Im getting 20 volts, 0.05 amps, board not booting, PPBUS_G3H 12.2, SLPS2R/AWAKE signals present, PP3V3_S5 missing.
With battery mac still turns on, and external devices can be recognized now. But still not charging.
Changed U7000, Q7030/40, checked all resistors around u7000 and both CD3217, they are all fine.
I'd appreciate any advice