820-00164 no post, image, dong - turns on

[ZAKLINTOWN]

Hi guys,
Another MacBook Air - clean, no liquid, absolutely clean board, first person working on it, 820-00164 11" turns on sees battery, does SMC reset if keys pressed, no post, dong, image - doesn't react if trying PRAM,
Checked voltages around U6100 and missing SPI_MLB_CLK, traced back to R6121 -> R6111 Pin1 receives it from U0500, any signals I can check for it in order to shoot out clock signal?
Thank you

 

[2informaticos]

" [h=2]no post, image, dong"[/h] Does this mean none present???
Or you get image and dong?

Do you get VCORE and PLT_RESET_L?
Did you try known good BIOS?

 

[ZAKLINTOWN]

Sorry for confusion - I don't get none of the 3 - no image, no dong, no post, tried USB mouse/keyboard on both USB ports,
I get 3.33V for PLT_RESET_L and VCORE is 1.8V
I tried BIOS of the donor board, but same result.

 

[2informaticos]

Try changing SMC.
If still the same, probably bad CPU...