A2159 820-01598 5V

Instafixx

Active member

Aug 13, 2025

• #1

U7410 (MFDF5804) shorted.
I didnt have the same ic so i replaced it with MFDF5808 which essentially does the same work.

After replacing MacBook turned on with high fan speed and lagging as if the cpu throttle.

As per my little knowledge this chip has something to do with CPU throttle.

Need your guidance.

 

2informaticos

Administrator

Staff member

Aug 13, 2025

• #2

If U7410 was burnt, CPU may be damaged now.

 

Instafixx

Active member

Aug 14, 2025

• #3

It wasnt burnt. A cap near it exploded.
Ppbus_hs_cpu was shorted.

 

2informaticos

Administrator

Staff member

Aug 14, 2025

• #4

Try DFU restore, just in case.

 

Instafixx

Active member

Aug 16, 2025

• #5

MFDF5804 and MFDF5808 are universal and interchangeable?

 

2informaticos

Administrator

Staff member

Aug 16, 2025

• #6

I couldn't find the datasheet for any of them...

 

Instafixx

Active member

Monday at 9:56 AM

• #7

i have verifird that they are universal.

Machine will not go in DFU.
SOC_FORCE_DFU goes high to 1.8V but still nothing on AC2.

 

Instafixx

Active member

Wednesday at 12:06 PM

• #8

Please reply

 

2informaticos

Administrator

Staff member

Wednesday at 4:40 PM

• #9

If you replace with identical chip, then something happened in the process if fan goes high.
But you can't be sure if CPU isn't affected.
If it is the problem, you may waste the time searching for something else.