Search results

My Mac is dead. I tested the power supply and I have 12V. Based on some videos online, I found a short circuit in a line that seems quite common to the problem, but I don't have a good circuit board to identify which line it is and there's no schematic. I removed a resistor to reduce the area...

I found a short circuit on the PP3V3_GH3_RTC line. It was a badly burnt U6960. I removed it and the short circuit disappeared, but when I put in a new chip, I have problems with the PPBus voltage fluctuating. As a test, I removed R6900 and the PPBus has 12.6V. If I leave the board without...

With the battery connected, I have 20V, it starts pulling 0.6A, 0.7A, and then drops to 0, looping. Without the battery, it stays stuck at 20V and 0.02A (stable). - I use an original 87W charger. - All CD3215s have perfect LDO lines - Same behavior on all ports - I tried to restore in DFU, but...

The customer said they were using their Mac, the screen went blank, and the sound continued. When they turned off the Mac and tried to turn it on, it started with the fan running at maximum speed. When checking the motherboard, I found oxidation on the UP800. I don't have this chip new, so I...

The client tried to replace the battery and reassembled everything incorrectly. The Mac stopped turning on. The CB701 was burnt. I removed it, and the line is free of short circuits. But the PPBus is still missing. I removed the F7000 and checked the line on the C7050; it had 0.5V. I replaced...

iMac won't turn on, only LED 1 lights up! The logic board had a short on the 12V line. I discovered it was QD330, replaced it, and fixed the short. There was oxidation on C5913 and Q8510. I replaced everything, but to no avail. The PP0V85_ENET line in diode mode has a value of 0.080. I lifted...

I've been struggling with this board for days. I'm using the schematic: 820-00134 It arrived with a short in the 12v line, I discovered it was the CA706, I replaced it and the board turned on. But it lasted a few minutes and then died again. The Q7610 shorted, I replaced it and it didn't have...

When connecting to the power supply, it quickly draws 0.600A and turns off, the cooler even starts to spin. The logic board had some oxidation on R8164, R3921 and R3558, I fixed everything and the problem persists. With the thermal camera I noticed that the U7600 and U7400 were heating up when...

The device came into contact with liquid. It is close to the QF910, UF900, UF960 and UR300. I cleaned everything, replaced components and the Mac started working again. However, sometimes the keyboard and trackpad stop working. I connected external devices and they don't work either. However...

The device turns on normally with the battery charged, but the Mac does not recognize the charger in any port. With the battery, I have 20v 0a. Without the battery, the Mac does not turn on, I have 5.13v 0.23a. I have 12v on the PPBus. In the CD3215 tests I noticed that at times I have, in...

Imac with intermittent sound. Sometimes the sound comes out of the speakers normally and then switches to the optical output. The volume icon shows a prohibition sign. I tried changing the P2 connector 3 times, but the problem persists. I searched the forum for alternatives to "kill" the P2...

I'm struggling with this logic board. If I turn it on with the battery and trackpad connected, the system doesn't start. If I disconnect the trackpad or the battery, it starts normally. I tested it with another battery and another trackpad, same problem. I checked the resistors on the trackpad...

The logic board is perfect, no oxidation. Using the original 96w charger, I have 20v - 0a on the 4 ports without the battery. With the battery connected, it gets 20a - 3a, but it doesn't turn on (probably charging the battery). I checked all the CD3215s (even with 20v, I thought it was better...

Mac arrived without turning on, with 5v on all ports. Perfect board, no oxidation. It didn't have the PP3v3_g3h line. I discovered problems on the PPVIN_G3H_P3V3G3H line, with 2v on the PM_EN_P3v3_G3H, after replacing the D6902, I now have 4v on the PM_EN_P3v3_G3H, but 2.2v on the PP3v3_g3h...

This is my first time using this model and I haven't found any boardview or schematics. If you have any tips, please. I removed the power supply and with it only on the power supply, there is no 12v! My question is, does it generate 12v without it being connected to the board? Some capacitors...

Still learning about the power sequence of M1 boards. The board is perfect, no oxidation. PPBUS_AON - 12v PP3V8_AON - 3.8v I only have voltage on the CD3217 that has a charger. Is this normal for this board model? Not to show voltage on both chips together? PP1V5_UPC0_LDO_CORE - 1.5v...

The logic board arrived dead. There was a short circuit in the PP3V3_S4_SOC_PMU line (C4203). After the repair, it turned on and worked fine for 1 day. Then it stopped charging the battery, all ports with the battery are 20v. Without the battery, 5v and 0.004a. The ports of the U3200 and U3100...

The customer replaced the logic board at Apple 11 months ago. It is perfect, no oxidation. During use, it has caused kernel panics! Mac freezes, coolers go to maximum in 1 second and restarts. Sometimes it stays working normally for hours! Follow the report generated, maybe you can shed some...

The client reported that the Mac was working, but it stopped recognizing the charger and the battery ran out. The board is perfect, with no oxidation. But in diode mode, the PP3V3_UPC0_LDO line was altered by 0.033. The UF260 was heating up a lot. My question: can I replace just the UF260 or...

The Mac works fine. But it doesn't turn off when the screen is closed. The hall sensor fails and the Mac turns on (as if the screen had been lifted). If you leave the Mac turned off, with the screen open, it doesn't turn on. I checked the board, everything is perfect. I looked for the sensor to...