Technical Support need help with A1466 820-00165-A no 5V on L7520 PP5V-S4RS3

[user61596]

Hi, I have here two Motherboards 820-00165-A.
First one working absolutly fine, was wather damaged, after cleaning, ws evrithing ok, but no Sound, I have Changed Chargingboard, and flex cable, but no results.
The another one, cant power on, and after connecting power suply current 0.02A no power, and I don´t get 5V on L7520.
can your please help with that, I need just one of this boards to repair.

 

[Hosein Asadolahi]

Hi, I have here two Motherboards 820-00165-A.
First one working absolutly fine, was wather damaged, after cleaning, ws evrithing ok, but no Sound, I have Changed Chargingboard, and flex cable, but no results.
The another one, cant power on, and after connecting power suply current 0.02A no power, and I don´t get 5V on L7520.
can your please help with that, I need just one of this boards to repair.

if you change miniboard and no result you must check many component and signal and voltage . like : u6410 ,j9500 , AUD_PWR_EN signal , .... .
another motherboard : you must check it yourself . i cant help you with knowing current drow and l7520 voltage missing . you must repair it your self . i suggest you watch all video and article and improve your Knowledge of electronic . We are here to teach you fishing, not to give you fish . Good luck

 

[eoprava]

Hello.
we need technical support. Macbook Air A1466 with motherboard 820-00165-A overheating CPU, random shutdowns, artifacts on display, with no obvious reason, it´s not first time we have this problem with this model, so we assume it´s a serial error on laptops like this. Please did you solved this problem already?

Thank you for reply

 

[Hosein Asadolahi]

Hello.
we need technical support. Macbook Air A1466 with motherboard 820-00165-A overheating CPU, random shutdowns, artifacts on display, with no obvious reason, it´s not first time we have this problem with this model, so we assume it´s a serial error on laptops like this. Please did you solved this problem already?

Thank you for reply

Many reasons for cpu overheating . maybe cooling heatsink have problem , maybe temp sensor have problem , maybe cpu cache have problem ( you can test it with mem test ) , bad smc ( reset smc) , ....
i suggest you disable turbo booster with Turbo Boost Switcher and test result .

 

[user61596]

Hello.
we need technical support. Macbook Air A1466 with motherboard 820-00165-A overheating CPU, random shutdowns, artifacts on display, with no obvious reason, it´s not first time we have this problem with this model, so we assume it´s a serial error on laptops like this. Please did you solved this problem already?

Thank you for reply

I have replaced the Motherboard with a another one