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No history available, I will keep the drop information in mind for future references. All my work is always done on board alone nothing else connected at all unless needed for testing the board, so no SSD and nothing else connected and those numbers are the ones I get.
Clean board no history.
No USB activity can be detected
Charger takes 0.5 A at 20 V (goes up from 5 V).
PP3V3_G3H =3.4 V
pp5v = 5.1 V
PPVCCCPU_S0G stays at 0.94 V
Already tried clean working BIOS same thing, CPU gets hot
Clean board, at this point this is a project as it was left here abandoned and it will be nice to repair it.
Came in with a short on PP3V3_S4_SOC_PMU C4205
I get 20V and 0.040A in USB meter
After removing short PP3V3_S4_SOC_PMU is still 0V so U4200 has no output.
Is U3900 the problem you think?
Clean board, no history.
All SSD rails measure correct.
Tried restoring and reviving T2 but fails.
Starting from external drive not possible because we cannot change startup options in recovery mode.
I am assuming that NAND chips or one of them may be dead.
Board came in from another shop with liquid damage and already messed with.
Mac had problems with audio codec and critical update, both got repaired, but now sometimes when the Mac enters sleep and you wake it up it goes into kernel panic and shuts down, this doesn't happen all the time but we...
L8504 5V, however the screen flex did not have those 5V, screen flex was the problem.
The reason why I thought it could be T2 related was because recently some 2019 non Apple screen were giving us hell with about same issues, thanks for your help @2informaticos
I will like to figure out if this is a board problem or Apple tying things to the T2 chip.
History, we have 2 clean no damage complete computers with no boards, we ordered a new board front a trusted vendor, board has the same exact behavior on both computer/cases: no camera, ambient light...
Clean board, MacBook seems like it was dropped heavy in one corner.
I already carefully inspected the board and found nothing.
Put it in UC and oven at 300c.
New good quality thermal paste was applied too.
The problem is that after about 3-10 minutes of use when using something line netflix...
SMC_ONOFF_L is steady high at 3.4V
Board alone tries to boot, I can see in the PS, but it shoots down shortly after and only a long press/short on SMC_ONOFF_L will turn it on
Battery is recognized and charge is fine.
Ok this board end up back in our place again and I will like to fix it this time.
Already checked all sensors in pages 42-43-44 they all look fine and measured correct.
When I plug the board to power I can see the amps go up then they come down and board shuts down.
If I short smc_on for...