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Hello, I have a MacBook that is stuck on the question mark folder. With the motherboard fully out and charger plugged in: 20 volts on charger, 0.43 amps PPBUS_G3H = 13.10 volts PP3V3_S5_SSD = 3.3 volts PP0V9_SSD = 0 volts PPVIN_2V7_NAND = 13.10 volts PP1V2_SSD_HOT = 0 volts PP1V8_SSD_HOT = 0...

Ohh, I see. Diode mode for PP3V3_AWAKE = 0.579 PP3V3_AWAKE is actually 3 volts sorry about that. PP3V3_S5 = 0.40 volts and diode mode is 0.290

Here is a thermal view of the board.

Hello, I have a MacBook Air that does not want to boot. Here are some of the voltages I have been looking at: 20 volts at the charger and cycling between 0.00 - 0.04 amps. PPBUS_G3H = 12.6 PP3V3_G3H = 3.3 volts PP3V3_G3H_RTC = 3.3 volts PP5V_G3S = 0 volts PP1V8_G3S = 0 volts PP1V8_SLPS2R =...

Fixed by replacing CD3215s and replacing shorted U6940.

Hello, I have a MacBook Air here stuck at 5v at the charger 0.04 amps. I am not getting PPDCIN_G3H at the source of Q3100. UPC_XA_GATE2 shows 5v, but UPC_XA_GATE1 is 0v. PP3V3_G3H_RTC = 0 v Is it just bad CD3215's or could it be something else thats causing PPDCIN to be gated?

Oops, yes. Water damage through the type C ports. It damaged the CD3215's which I replaced afterwards - charging fine. There was also a short on the primary type C port. I had to cut it off physically to fix it because it was pretty bad. I am waiting on a new type C replacement part to arrive...

Hello, I have a MacBook Pro with CD3215 properly switching to 20v. However, I am unable to use any kind of USB device such as mouse or USB drive using Type C to USB adaptor (tested working on other machine). I replaced both CD3215's already and same issue.

Okay, so I did more tests and then found that WS_KBDx signals + pin 2 / 9 of the TP connector (Z2_CLKIN & Z2_SCLK) were fluctuating regardless of whether or not TP is connected. I was convinced that maybe something was in the TP connector (because why all of a sudden is it acting like this after...

The power rails for the keyboard is steady. Here's something odd I found. When I disconnect the trackpad flex cable, the WS_KBDx signals are steady and the keyboard is very responsive. As soon as I reconnect the trackpad + flex cable, it jumps up and down. When I leave the trackpad flex...

Oh yes, I meant to say all WS_KBDx signals are fluctuating same time.

Okay, so I replaced U5701 (twice) and exact same result. WS_KBD fluctuating but it seems to be better? 1.5 - 3 volts Maybe a coincidence. I then replaced U2700 and still not working. Z2_SCLK / Z2_CLKIN fluctuating 0.5 -1.5 volts. Seems like there is only so many places to look, but I can't...

Okay, I will replace U5701. Must I get it from the same board number? Are there any other boards I can take it off of? I noticed 820-3115 and 820-2936 have same CY8C24794 337S2983 MLF SYM_VER2 Does this mean they have similar firmware?

Here are the readings. R5701 - fluctuates 0.5 - 3 volts R5702 - 0.00 - 0.02 cycles R5704 - 3.3 volts TPAD_VBUS_EN - 3.3 volts BUTTON_DISABLE - 0 volts Going to see what's the issue with R5701/02

Hello, I have a MacBook Pro with non-functioning trackpad and keyboard. Tested new keyboard / trackpad and still not working. The keyboard (new and old) will only work if I hold the key a little bit. I checked WS_KBD and all of them are fluctuating a lot between 0.5 to 3 volts. Never...

Hello guys, I spent a lot of time looking for a source for the type C port, but failed. Anyone know a good place to get them in a reasonable time?

I compared screen assembly readings and here are my findings. I noticed pin 33 varies a lot on the bad assembly - MIPI_DATA_CONN_P, but other than that everything else seem to check out. I don't think this pin has anything to do with backlight, so it might just be done for.

Luckily I had another display to test, it definitely is the LCD assembly. However, I am unsure if the customer will be willing to bring to Apple for the backlight service program. He took it there initially and now it is obvious that it was worked on. Anyone have any success in repairing the...

Hello guys! I have a MacBook Pro 820-00875 with backlight issue. Customer brought it in because it would not turn on after it went black randomly while browsing. Plugged in charger and it was giving 20v @ 0 amps. I found a short on PPBUS_G3H. Fixed it by replacing U7430. No more short...

Looks like it would power cycle.. 2.4 volts then 0.08 volts after a few seconds. I think the CPU is screwed.