When you power on the motherboard without keyboard does those voltage dropped .PP3V3_G3H (C7670 pin 1): 3.35V
PPBUS_G3H (C3500 pin 1) :12.63V
When you power on the motherboard without keyboard does those voltage dropped .PP3V3_G3H (C7670 pin 1): 3.35V
PPBUS_G3H (C3500 pin 1) :12.63V
put your keyboard back than try to do a reset for SMC like that :PP3V3_G3H (C7670 pin 1): 3.38V
PPBUS_G3H (C3500 pin 1) :12.63V
but on PP5V_G3S (C7607 pin 1): 0.01
All is connected without the keyboard, and I lose the 5V before I push the power button.
I tried exactly as you told me, the macbook was turned on, but something strange was happened, I attached some videos with exactly situation which happened.put your keyboard back than try to do a reset for SMC like that :
View attachment 38592
- On your built-in keyboard, press and hold all of the following keys. Your Mac might turn on.
- Control
on the left side of your keyboard- Option (Alt)
on the left side of your keyboard- Shift
on the right side of your keyboard- Keep holding all three keys for 7 seconds, then press and hold the power button as well. If your Mac is on, it will turn off as you hold the keys.
I tried exactly as you told me, the macbook was turned on, but something strange was happened, I attached some videos with exactly situation which happened.
I could enter in the recovery assistant, but at some point the macbook was turned off, and I tried to do reset the SMC again, but the macbook remains off...
How can you explain that?
Actually is beyond me....
Hello again,put your keyboard back than try to do a reset for SMC like that :
View attachment 38592
- On your built-in keyboard, press and hold all of the following keys. Your Mac might turn on.
- Control
on the left side of your keyboard- Option (Alt)
on the left side of your keyboard- Shift
on the right side of your keyboard- Keep holding all three keys for 7 seconds, then press and hold the power button as well. If your Mac is on, it will turn off as you hold the keys.
spin goes a full maximum mean that some sensor devices not connected well .Hello again,
I tried to perform again all the steps that you told me and today I really succeed to open the macbook, but I noticed something, when the macbook waited for me to introduce the password, the fans was not spin at all, and the heat pipe was very very hot. Another thing I saw was when I tried to disconnect the keyboard connector and it was half disconnected the only left fan starts to spin to a full maximum capacity. You can see more specific and in detail in the videos attached.
So, I am asking you, do you thing the problem is on the 5V fan power supply line?
Your help will be appreciate it.
Thank you in advance.
ok, so that explain why the starts to spin in a full maximum load, but also why is not spinning at all when the macbook was turned on?spin goes a full maximum mean that some sensor devices not connected well .
There is some Software tool that can do an auto diagnostic to check for a sensors problem, fans, and other things but i don't remember the name of this software .ok, so that explain why the starts to spin in a full maximum load, but also why is not spinning at all when the macbook was turned on?
Anyway, the software will not help me because I am in the same situation, missing 5V and the macbook was not turn on anymore...There is some Software tool that can do an auto diagnostic to check for a sensors problem, fans, and other things but i don't remember the name of this software .
You can try to change it but it's not easy to do it.Anyway, the software will not help me because I am in the same situation, missing 5V and the macbook was not turn on anymore...
It is a loop, something happened and cut the 5V and I really don't know what.
What I noticed the ENABLE signals from U7800 are missing all of them, I think the IC is the problem...
I don't have any options, but actually I really don't know if I could find a replacement for that chip....You can try to change it but it's not easy to do it.
pin 12: 0VWhen you power on your laptop you will get PMU_PVDDMAIN_EN mean P5V_P3V3G3H_LDO_EN
And
P5VG3S_EN mean P5VG3S_EN_R
For R7671 and C7640 if you see the schematic you will see "NO STUFF" is been writed under those components.
NO STUFF mean not been installed.
Check those pin 21, pin 12 ,pin 4 on U7650 .
do yo mean pin 3 and GND, to measure impedance?Check impedance between the 3 pin above .