A2681 Battery not detected

kashitozu

Member
Hello,

I have a MacBook A2681 820-02536
The customer brought me the computer, which would not turn on. I found a short circuit on the C77F6 capacitor.
I removed it, then replaced the PMU U7700, and the computer started up normally, but the battery is not detected.
When I test the values of the battery slot, everything is fine, including the voltage. I have 12V on pins 10, 12, 14, 16, 26, 24, 23, 19, and 20.
On pin 13 (SDA) I have 1.8V and on pin 11 (SCL) I have 1.8V.
Then on pin 15 I have 0.130V, so the voltage is too low,
and on pin 2 I have 0V.

Can you tell me where this is coming from?

Translated with DeepL.com (free version)
 

2informaticos

Administrator
Staff member
"on pin 15 I have 0.130V, so the voltage is too low"
Why not good for you?
Do you know what end "L" means???
Just in case, be sure SYS_DETECT is high.

You may have problems with UD200, or its adjacent resistors.
 
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