please clear me this bios efi macbook macbook pro 13 inch a1278 820-2879 
		
							
						
					macbook pro 13 inch a1278 820-2879
				
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			by CG_DionysosHello,
 
 I am looking for the boardview file and the matching schematics (PDF) for the following MacBook Pro:- Model: A1707
- 15-inch, Mid 2017
- 3.1 GHz Core i7
- 16 GB RAM
- Radeon Pro 560
- 1 TB SSD
- Board number: 820-00928-A
 
 
 Thanks in advance!
 
 Greetings from Germany...- 
							Channel: Schematic Requests ONLY!
 09-16-2025, 06:43 AM
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			Hey! This is a A1278 macbook 2011.
 
 Problem: Not turning on / No green light
 
 Im using by3200s charger.
 
 Voltajes:
 
 PPBUS_G3H = 12.26v
 
 SMC_RESET_L = 3.3v
 PP3V42_G3H = 3.42v
 
 U7000 =
 
 Pin 1 CHGR_AGATE = 0v
 Pin 2 CHRG_DCIN = 19v
 Pin 3 CHRG_ACIN = 4.6v
 Pin 10 SMBUS_SMC_BSA_SDA = 3.3V
 Pin 11 SMBUS_SMC_BSA_SCL = 3.3V
 Pin 12 PP3V42_G3H = 3.42v
 Pin 13 CHRG_RST_L = 3.3V
 Pin 14 SMC_BC_ACOK = 0.8V
 Pin 19 PP5V1_CHRG_VDD = 5.05V
 Pin 20 PP5V1_CHRG_VDDP = 5.03V...
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			by RezendesHello, I am looking for any and all files related to the mainboard for 820-2565-A (13" Macbook Pro A1278 mid 2012) schematics/board view.
 
 I looked through forum search results and google and was unable to find a board view file, I found a pdf of all the schematics but I don't know where the parts physically are on the board as this is my first macbook board level repair attempt.
 
 The macbook charger has a green light, the battery has been replaced and OS reports Normal status but Not charging. After cleaning a corroded capacitor it crumbled off the board. There...- 
							Channel: Schematic Requests ONLY!
 
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			by pcbmaniacSubject: Help Needed: MacBook A1278 (3115) No PPBUS_G3H Issue
 
 Hello everyone,
 
 I'm working on a MacBook A1278 with the 3115 logic board and facing an issue with no PPBUS_G3H voltage. Here's what I've checked so far:- U7000 Measurements:- Pin 3 has 0V, even though R7012 shows 16.5V from PPDCIN_S5_CHGR.
 
- Resistors:- I measured R7010 and R7011 with one leg disconnected, and both tested OK.
 
 
 Based on these findings, I believe U7000 needs to be replaced. However, I have a related question:- If I also decide to replace the SMC, do I need to order it pre-programmed,
 
- U7000 Measurements:
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			by BmetHi,
 
 I have a MacBook Pro 13 inch A2238 M2 and it was stuck 5V with 0 amps. I measured some important lines and I found a short on PP3V8_AON_MPMU_ISNS_VIN, I tried injecting 1v and I saw heat coming from the mPMU so I removed the pmu thinking that was the problem. I don't know why I didn't check the other side of the border but there it was, a shorted cap. I replaced the cap and the short was gone, so I reballed the PMU and put it on again but voltage was still stuck at 5V and the current was fluctuating between 0 and 0.45 amps. I checked under the thermal camera and I saw the mPM...04-02-2025, 05:02 PM
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