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Hello, I have an A2141 - 820-01700 MacBook Pro that does not want to turn on. Motherboard is clean, free of any corrosion. Checking all ports I found one that was showing nothing on the amp meter when the other ports showed 5v - 0.380 amps. I replaced UB300 and now we see 5v 0.380 amps on all 4...

Hello, I have an interesting case here. MacBook Pro A2141 - 820-01700 where charging is working perfectly on all 4 ports but USB 2.0 / USB 3.0 devices are not working. I have a USB Flash Drive that have both USB A and Type C connectors, Type C would work, but USB A does not. Any tips on how to...

Hello, I have a MacBook Air that does not charge. Amp meter showed 5 volts for both ports, 0 amps. Changed both Type C chips and now we get 20 volts and 0.28-0.32 amps. It turns the computer on, but does not charge the battery. Tried new battery and it is still not charging. Any advice? Thanks!

Hello, I have a MacBook that does not want to boot. - We get a green light on the charger, fan spin, but no chime or display. - External USB portable drive doesn't show any activity, seems brain dead. - No signs of liquid damage. - Tried clean ME region. PPBCC_S0_CPU_PH1 / 2 / 3 = 1.7 volts...

Hello, I have an iMac with a faulty motherboard it seems. None of the LED light indicators are on and I confirmed that 12V is being provided by the power supply. I also replaced the power supply to rule it out. Seems to be failing very early in the boot process and I am wondering how can I...

Hello, I have a 820-01041 MacBook Pro that does not want to boot up. The customer had the battery changed at a different shop and then brought it to us. What it would do is load up the Apple logo and then restart and repeat. If I go into internet recovery to choose the Wi-Fi and input the...

Hello, I have a 820-3332 MacBook that is kernel panic'ing. We did an SSD replacement because there were definitely some faults on it however the kernel panicking is still happening. I redid the solder on U8900 (ISL628) and even changed it, I also changed the SSD a second time, however the...

Hello guys, I have a 820-01814 (using 820-01041 schematic) and found that PPBUS_G3H is power cycling. It measures 10.9 volts most of the time, but in short 3-4 second bursts it holds at 12v and in some cases 13v - battery connected. It stays 12.3 volts or sometimes 13 volts when battery...

Hello, I have a MacBook Air that does not want to turn on. Plugging in a known good charger shows a blank amp meter screen when typically we see 5v or 20v. I replaced the type C charging ports and replaced the CD3217's to quickly rule them out. I have a schematic, but I don't have a board view...

Hello, With and without the battery connected, I get the 20v on charger and a charging battery symbol on the screen, but does nothing else. Plugged in charger, I get 20v 0.75-1.2 amps for 25-30 seconds This is with the board alone on the desk After 25-30 seconds, it will go to 20v 0 amps...

Hello guys! I have a MacBook that had water damage. It had missing 20v which I fixed by replacing the type C chips and charging port. It had PPBUS_G3H, but no CPU core. Fixed it by replacing bad R7101 / C7101 and ran a wire to U7100 CPUVR_VIN. Now it boots, however it would never get past the...

Hello, I have a MacBook Air here that powers on just fine. I am able to hold D or start Internet recovery, but as soon as I connect to Wi-Fi, after 5-10 seconds of it starting, the computer restarts. The main operating system also loads to the Apple logo, stays there for 20-30 seconds and then...

Hello, I have a 820-00163 that powers on with a fan spin, but nothing else. Customer said it just suddenly stopped working. No corrosion found, board looks clean. PPBUS_G3H = 12.6 volts PPVCC_S0_CPU_PH1 = 1.8 volts PPVCC_S0_CPU_PH2 = 1.8 volts PPVCC_S0_CPU_PH3 = 1.8 volts PPVCORE_S0_GFX_PH1 =...

Hello, I have a 820-01700 water damaged motherboard. Corrosion on U7230 and UA750 as well. PPBUS_G3H shorted to ground and found out U7230 sent the voltage to the CPU. I just want to make sure the CPU is indeed fried. I currently have 20 volts 0 amps on the charger (why 0?). I already replaced...

Hello, C7553 was shorted (PPBUS_S5_HS_COMPUTING_ISNS). Replaced and now got fan spin, but getting 3 beeps indicating RAM issue? Battery is connected and it runs off battery just fine. PPBUS_G3H = 8.4 volts PPDDR_S3_REG = 1.359 (low?) PPVCORE_S0_CPU = 1.1 volts PPCPUVCCIO_S0_REG = 1.08 volts...

Hello, I have a MacBook A1706 EMC 3163 which had screen damage where there was a 2 inch vertical section of the screen that was completely black with a little bit of static / grainy screen which I haven't really noticed until a little later. Replacing the screen got rid of it, but what remains...

Hello, I have a MacBook here that does not want to turn on. On the charger, I can see 0.04 amps for a split second then 0 amps for a few seconds and then it cycles again. No signs of liquid damage. Where do I even begin? PPBUS_G3H = 12.6 volts (0.398 resistance to ground when off) PPBUS_HS_CPU...

Hello guys, I have an 820-3299 that originally had a question mark issue. We decided to switch out the hard drive with an SSD and when putting it together, it no longer wants to boot and has 3 beeps, few seconds pause, and 3 beeps again until I power it down indicating RAM detected in bay but...

Hello, I receive a MacBook Pro that does not want to turn on. I found there was a shorted U7310 (unsure if CPU is fried already). Replaced, fan spin and was ready to put together to test, but no longer getting a fan spin after unplugging and replugging charger. Checked ALL_SYS_PWRGD not...

Hello guys, I have an 820-00840 that had corrosion on the battery connection (battery itself and not on the motherboard). There are also red indicators showing there had been moisture around the board, but corrosion is pretty much non-existent - looked everywhere. The MacBook turns on, but gets...