Search results

both lines with 3.4v

I checked everything around the UP800, everything was perfect. I replaced the UP800 again for testing and also the LVDS cable, with no results.

3.4 ohms on both C7020/23 SMC bypass mode doesn't turn on. The meter stays at 5.1V, turns off, and returns to 20V, without turning on. I'm using an original 87W charger. I also tried a parallel charger.

Yes, I tested it. I used a complete case, with everything 100% original. To test the cooler issue at maximum, too. But both issues persist.

The C7050 is still 0.5v. I replaced the Q7030/40 and nothing changed! I checked the R/C7030/40, everything was perfect.

Yes. Sorry, I forgot to mention. It works fine on the external monitor.

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...

The iMac worked perfectly for a week. But it shut down during use and wouldn't turn on. The QD330 shorted again. Any suggestions on what might be causing this short?

I replaced the display sensor and the iMac is stable. I'm continuing with the tests.

The iMac keeps turning on, but again there's no backlight on the screen and the fan is running. I replaced the screen data cable, but the problem persists. Any tips?

After the SMC reset, the screen's blackout came back. I ran HWmonitor and it's showing the display sensor triggered. I'll try to find a cable to test it.

The device turned on normally. During testing, I restarted and reset the PRAM, and it came back without BKL and the cooler was running.

I assembled the iMac to return to the customer, and like magic, it turned on! I'll continue testing and provide feedback.

I have no pulse on the other LEDs. The 12v_s0 line is stable at 12v. I have stable 3v3_G3H and 5v_g3s, but I have no voltage on any of the S5 lines. I'm testing without the battery.

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 discovered that the short comes from PCH! =/

Something very strange! I injected voltage into the line, but the only thing that heats up is the component I'm touching. I tested several components, always the same problem. The thermal camera doesn't find anything, only the component itself. I'm putting in 1.5v.

After replacing the Q7610, I checked the L7610 line in diode mode (0.450). The PP3v3_S5 line shorted out in diode mode (0.002). It was normal at the beginning of the tests, could it have been the Q7610 that fried something? Can I inject voltage? I am aware of the ISL62383C, that's why I...

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...