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SMC_ON_OFF_L (2.96V) might be slightly lower then its supposed to, I don't think its bad enough to cause issues however.
The fact you have 1.1V at PP1V1_S0GPU means you're in a S0 state so the device is most likely waiting on the CPU to finish its POST routine or other signals indicating boot...
Actually, I have managed to get the thunderbolt to work again a couple of times.
If you keep the device powered off for 2-4 days and boot it up it works straight away and thunderbolt hardware is actually being found:
I've tested its functionality by using a thunderbolt ethernet adapter and...
Just to be sure, the 45W doesn't get detected by the system at all? Or does it simply just not charge with the 45W?
Voltage of PPDCIN_G3H with the 45W charger connected?
If its charging with 60W+ chargers I doubt U7100 itself is the culpit, I would suspect the SMC the most but even that...
Any chance the 85W charger is a fake?
Sounds like it has issues communicating with the charger. Does swapping I/O boards resolve the issue? I/O Cable looking ok as well?
Does the system still detect the charger or not? If it does detect the charger, does it charge the battery from it without...
If heat affects the issue its definitely a problem with the LCD display itself because the metal and solder will slightly expend.
I've had Macbook Air displays (older models) with lines across the screen that went away or came back depending on the temprature
Old post but FYI the meter is probably 100% OK, it usually doesn't damage anything on the meter itself because they know people will at some point put it on a powered circuit by accident. Its readings will just be useless while the board is powered however though
Isn't the frozen setting set by using disk encryption? Not sure if all Apple SSDs have these set after using FileVault (Default on pretty much all models with a new version of OS X), might also be enforced by the BIOS.
You might get some luck by using the Parted Magic live CD ($11 one time...
Most board view files available do not have traces inside of them AFAIK, so no tool is avaliable to see them.
Correct me if I'm wrong please (I'd love to be wrong on this one)
How about SMC bypass like was asked? Do this by disconnecting all power sources (Battery + Magsafe) and having the power button pressed (or with R5115/16) while plugging the charger in. Keep the button pressed until the device powers on, if it doesn't do that after 15 seconds you can give up...
If you have a multimeter you might be able to catch this by setting it to its most sensitive DC Voltage mode, you will see it shoot up a little bit that way.
Another option is using a LED with a 500 to 1kohm resistor to the PP3V3_S4 rail (Or to PP5V_S4 with appropriate resistor so the LED...
Honestly this is a board issue related to the SSD at U8801/10 or the controller at U8400. (Most likely controller).
From what I assume from your screenshot is that the controller is not being detected at all, which could be related to the controller itself but also due to broken internal traces...
Never have managed to, I think its an issue in the CPU itself because it seems to be the one that initiates the power down by pulling the signals.
If you have any additional information I'm still interested though!