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820-3536-A dead
- Thread starter LaptopRepair
- Start date
LaptopRepair
Member
Just 5v it lets almost 5A be runned. and the CPU become hot. the small DIN become hot first then the big DIN.
LaptopRepair
Member
I ve lifted all 4 FET's on the CPU circuit. 1 of them is indeed shorted.
you said that this will kill the CPU, is it possible to replace the CPU? And can you explain me how this can be caused?
you said that this will kill the CPU, is it possible to replace the CPU? And can you explain me how this can be caused?
LaptopRepair
Member
Do you ve a simillar good working board and how much it will cost?
LaptopRepair
Member
Ok. before closing this thread. can you tell me how i can confirm for sure that this CPU is dead?
LaptopRepair
Member
You said "the high side" what do you mean by that?
By measuring the coil L7630 I found it short also on pin2 side.
After lifting the CPU the short is gone from the board.
i ve found thouse CPU on aliexpress for sale. 125$ new price. what is your experience on those chips from aliexpress (quality)? if you buy from those.
Do you have any good chip supplier to advise me.
is there a way to test the cpu outside the board for short? like testing caps on bottom of it with continuity tester.
By measuring the coil L7630 I found it short also on pin2 side.
After lifting the CPU the short is gone from the board.
i ve found thouse CPU on aliexpress for sale. 125$ new price. what is your experience on those chips from aliexpress (quality)? if you buy from those.
Do you have any good chip supplier to advise me.
is there a way to test the cpu outside the board for short? like testing caps on bottom of it with continuity tester.
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LaptopRepair
Member
I want to come back on this case;
Like Louis said 3 days ago on his live streem that CPU's can be replaced if we don t get often macs to repair a day. If not I can replace it. In my case I get just 1 a 3 macs a month for repair.
Also the customer blaims me that I m responsable for damaging his board, because he gave it me working. Now I said to him that the board is dead. He didn t picked it up.
My question is can somebody here help me with ME region rectification if I buy the CPU?
Like Louis said 3 days ago on his live streem that CPU's can be replaced if we don t get often macs to repair a day. If not I can replace it. In my case I get just 1 a 3 macs a month for repair.
Also the customer blaims me that I m responsable for damaging his board, because he gave it me working. Now I said to him that the board is dead. He didn t picked it up.
My question is can somebody here help me with ME region rectification if I buy the CPU?
Uhm, first you replace the CPU then see if it works and only after that we will fix the ME. But be warned you are wasting your time and money, this will probably end in tears.....
Please take the advice from someone that does 10 of these a day. Do not replace the CPU unless you have one sitting around that is free, do NOT spend $100+ on some chinese junk CPU DO NOT WASTE YOUR MONEY.
Please take the advice from someone that does 10 of these a day. Do not replace the CPU unless you have one sitting around that is free, do NOT spend $100+ on some chinese junk CPU DO NOT WASTE YOUR MONEY.
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