Recent content by 2informaticos

You should have problems with U5800, or one of its sensors.

This looks good. May have something else damaged on 5V_S2 power rail.

"Couldn't check the charging" ??? Monitoring battery voltage is good enough; it should slowly increase. Tried known good trackpad board/flex?

Test disconnecting camera flex.

Check J4401/2 signals, with touchbar connected. Can you load macOS in safe mode?

Looks a bit low for me; compare with good board. I expect 0.300-400 reading. I had one A2681 which started working randomly. It had 0.110-145 diode mode reading. Injecting 4-4.2V for some minutes made it starts; only U8100 showed a bit of heat signature. After some time didn't start again...

Inspect the connectors and their traces. There may be mechanical damage.

What is actual diode mode reading at 3V8_AON?

What is diode mode reading at 3V8_AON?

Sometime S-UEM2 tester doesn't make good contacts; possibly flex issue. Test this, just in case: https://drive.google.com/file/d/1T2AbrR-qsyiPh3KrrX8aEXZP6E6KA8oF/view?usp=sharing Keep in mind, I can't assure is good!

Be sure Q3100 is good. Check for moved components in U3100 area. Should be better to replace the chip, not reballing.

Check all traces and components related with J4401/2.

4.2V shouldn't be a problem. Anyway start with just 1V and slowly increase it. A good thermal camera should detect the culprit before 3V. BTW, set amp limit to max on PSU first.

Not at all; you have short to ground!

Nobody reported such issue similar with old models, for these machines. Also new CPU/GPU power supply chips (SiC/FDMF) are not recognized failing like old FDMF6808. You should really have a bad GPU in this case...