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Hello I started working on a 820-2915-B. When charger was plugged, I had a green light, but no fan spinning and no boot. C7200 was missing on the logic board. Found the feet of the cap in place but the cap's body was gone. Plus, C7203 seemed partially damaged. I replaced them, and plugged the...

Hello, I got this A2141MBP a few month ago. It wasnt able to boot nor display anything. I let it on a shelf. I plugged my USB-C ampmeter today on each USB-C port. Being in front of the MBP, I got: USB-C, left* side, back*, 20V and 2.4A. When I pressed on On, or maybe before, I got the "empty...

I have a A1398 820-00138-A able to boot after I press on ON. The OS loads, and I reach the login screen. There, the trackpad does not click, the cursor does not move. It behaves as if the macbook was turned off. Not a single key of the keyboard works. The keyboard does have its backlight. If I...

Hello, I have a MacBook Air that suddenly stopped working while I was reinstalling the OS. No prior work on the logic board. PPBUS_G3H: 8.58V PPBUS_S5_HS_COMPUTING_INS: 8.58V PPBUS_S5_HS_OTHER_ISNS: 8.58V PPDCIN_G3H: 16.42V PP5V_S0: 5.08V PP3V3_S0: 3.304V PP3V3_S5: 3.304V (as I have S0...

Good evening, I started investigations on a board that suddenly stopped working out of the blue. I get an Amber Light, fan spinning, PP5V_S5, PP3V_S5, but no S4. I do not have any PP3V3_SUS. Logic board is out of the case. PPBUS_G3H: 12.53V PP5V_S5: 5.00V PP5V_S4: 0V PPVRTC_G3H: 3.24V...

Hi, I'm on a 820-3462 board that does not chime. There is no image on screen, and no light if USB Mouse plugged. Fans are spinning. The board is able to charge the battery, and remains powered on if i unplug the charger or the battery. This part of the circuitry seems working. I get the orange...

Hello, I got a MacBook Air 2020 M1 13i A2337, logic board 820-02016, able to boot, and works properly if I plug an external monitor and close the lid. However, there is no way to see anything on the macbook air's screen itself; it stays black. I measured CP860, pin 1, it goes up to 357mV...

Hello, I'm working on a A1990 that does not turn on anymore. Charger is stuck at 5.19V (stable) on each of the 4 USB-C ports, power stays at 0.036A (+/-0.002A). With the battery plugged in, logic board not taken out, I measured: 3.37V on the testpad PP3V3_G3H_RTC_X 7.59V to 12.27 on the...

Hello, The MBP is able to boot, load the OS, but the screen stays black. If I plug an external monitor, I get an image. The keyboard and trackpad work properly. Measurements on J8300 are: 1.978V on pins 28-29-30. As I get 5.00V on pin 1 of L8300, and 1.978V on pin 2 of L8300 & pins 28-29-30...

Hello, I apologize if this is not the right place to ask, but I didnt find which of the forum section (Macbook Logic Board Repair, Tools, Business talk, Off topic, iPhone, Diet...) was the most relevant for that. I will have to buy a few replacement keyboards (and Touchbar) for A1990 and A2141...

Good evening, I have a 820-01958 with water damage. Corrosion was especially present around Q7680 and Q7660. There was also corrosion around CC714 / CC715, CC716, CC717, CC7A0, CC8A1, R7686, R7666, CC760, CC761, CC786, CC787, C7681, CC789, CC788, C7660, C7060, CC784, CC785, R7070, R7071, D7070...

I'm working on a 820-3330-B; MacBook Pro does boot, there is a chime, and there is image, but no backlight. I measured voltages on J9000. I do have 3.308V on pins 2&3 I do have 40V on pins 38, always, but 0V on pin 39 (sometimes 30V) and 0V on pin 40. Probably a measurement issue, because 9...

Good evening, I have a MBP 2012 with 820-3330-B logic board without Backlight but with image; if I apply some light from the back of the lid, I can distinguish a "question mark folder". The LVDS J9000 connector had obviously been damaged; pins 38, 39 and 40 burnt. Connector now removed. 0V on...

Hello, I have a 820-4924-A, on which liquid was probably spill. Charger's light stays amber. No boot. I found similar thread there : https://boards.rossmanngroup.com/threads/820-4924-no-pp5v_so-s3-s4-rails.53764/ I already measured the below: PPBUS_G3H: 12.66V (F7140, pin 1&2) PP5V_S5: 5.06V...

Good evening, I have a 820-4924-A logic board with amber and green light on the charger. The board is currently out of the MacBook,and not connected to anything besides the charger. I measured PPBUS_G3H on the fuse F7140. Pin1: 12.68V Pin2: 0V I unplugged the board, tested the fuse with...

Hello there, I'm trying to fix a mistake, very likely mine, whose consequence seems to be an unstable 5V rail, on a 820-3332-A logic board. Context: Initially, I had no image on both the external display and the laptop screen; since PPVCORE_GPU and PPVCORE_S0_GFX_REG were 0V, I applied some...