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820-01521 not detecting battery

Y

Yoel Ren

Member
Hi, this board came in very slow, not detecting battery, and maximum fan spin, built in asd say battery is not detected and there's a problem with smc, but from experience, i can solved this with change battery.. the question is, can i repair the sensor which located at the battery mini board ?
is there any schematic for the little battery board ?
 
2informaticos

2informaticos

Administrator
Staff member
No way, try known good battery.
Internal processor has setted an error flag.
Cells are good, but battery is locked...
 
2informaticos

2informaticos

Administrator
Staff member
Is not about T2.
Each battery pack has an internal processor; special sofyware and interface required to unlock an error flag.
 
Y

Yoel Ren

Member
i fucked up.
I was soldering speaker connector which customer tore, and i FORGET to unplugged the battery, i think i saw a spark at a caps at headphone port which is a ppbus caps. ( connected by j6100 ) , I straight away think this is a t2 problem.. but after many hours trying to dfu, still cannot.
I then remeasure power rail, and I found out pp1v8_slps2r is shorted, resistance to ground at 2 ohm, but injecting power doesnt heat anything
 
Y

Yoel Ren

Member
yeah, im in just in denial, t2 is warmy after all.
I have speak to the customer about this. and he agreed to upgrade to 2019 macbook air with some fee, thank god no critical data needed..
 
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