Macbook A1466 820-00165 resets every 10 seconds

[AlexVG]

Hi,
It have had a problem with U7100 and short circuit in Q7130.
I replaced them.


It starts now and waiting 20 seconds and then starts to reset PM_SLP_S4_L every 10 seconds.
Almost all voltages rising
except U3090 and U3210 (LED) - not receives enable signal.

U4500 is trying to rise - receives enable only 2-3 seconds

Here is my measuring of important signals.

What else could be the problem?



I need to help.
Thank you an advance.

[mon2]

Re: Macbook A1466 820-00165 resets every 10 seconds

https://repair.wiki/w/A1466_2015-201...9D_MacBook_Air

Review the voltages to ground on the SPI flash device.

[AlexVG]

Re: Macbook A1466 820-00165 resets every 10 seconds

Thank you for the link!
I can observe SPI exchanging.
To be sure I have put a new dump from here.

[mon2]

Re: Macbook A1466 820-00165 resets every 10 seconds

Try with SMC bypass.


Update:

https://logi.wiki/index.php/820-00165_Pulsing

[AlexVG]

Re: Macbook A1466 820-00165 resets every 10 seconds

Try with SMC bypass.

Update:

https://logi.wiki/index.php/820-00165_Pulsing

Yes, I have tried to start it in SMC bypass mode - nothing
I passed step but step this guide - nothing

[AlexVG]

Hi.
I have manage to find the problem.
In my case missed exchange between CPU and U7200.
CPU_VIDSCLK
CPU_VIDSOUT
These lines have 1V, but without any commands from CPU.
CPU_VR_READY was high.
I cleaned the main in a ultrasound bath and reflowed then the processor.
Main starts.
However I must reball the processor.
Thank you everyone.