-
For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.Subscribe Now
Recent content by eclipsevl
-
E
820-3787-A mid 2015 DG power cycle
>Starting in SMC bypass suppose a problem with a SMC sensor (pages 44-46); check AVREF_SMC first. AVREF_SMC = 3.3V >When started, check for USB activity; don't waste time checking backlight yet. Did not check USB activity yet; checked activity on SPI CS line - always high. New observation...- eclipsevl
- Post #6
- Forum: Macbook Logic Board Repair Questions
-
E
820-3787-A mid 2015 DG power cycle
Ok, got weird results in SMC bypass. 1. First attempt it started right away, fans spinning 100% 2. Second attempt - It started at like after ~4-5 cycles (power up cycles). PPVCC_S0_CPU = 1.8 PP1V5R1V35_GPU_REG_R = 1.5 P1V05_S0GPU_REG_R = 1.05 PP1V05_S0_REG_R = 1.05 PP1V35_S3, PP5V_S4 = 5...- eclipsevl
- Post #4
- Forum: Macbook Logic Board Repair Questions
-
E
820-3787-A mid 2015 DG power cycle
Thank you! :) > Be sure to correctly rebuild the broken trace; where you've found the shorted cap. There were no broken traces, looks like cap was connected only to via. > Check all SPI Bus Termination resistors and their traces. There is 3.3k resistor at CS, no external resistors on other...- eclipsevl
- Post #3
- Forum: Macbook Logic Board Repair Questions
-
E
820-3787-A mid 2015 DG power cycle
Hi, I've got a 820-3787-A board which is stuck in power cycle. PP3V3_S5 is fine. Got orange led on the magsafe plug. With multimeter I could see that PP1V5_S0, PPVCC_S0_CPU, PP1V5R1V35_GPU_REG_R, P1V05_S0GPU_REG_R, PP1V05_S0_REG_R, PP1V35_S3, PP5V_S4 are trying to start up, there is a voltage...- eclipsevl
- Thread
- Replies: 6
- Forum: Macbook Logic Board Repair Questions