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820-00165-02 - Won't Charge

menatwork

menatwork

New member
The computer works fine without the battery.
The thing is: I can't charge, bc when i put the battery back the computer don't turn on and i don't get green light.
Already check two different battery, so i'm sure thats not the problem.

Were i can start troubleshooting for give you guys idea what could be wrong with this board?
 
menatwork

menatwork

New member
U7100

1 - 0
2 - 16
3 - 4.48v
4 - 3.33
5 - 1.13
6 - 0
7 - 0.79
8 - 1.4
9 - 0.39
10 - 3.29 to 3.42
11 - 3.29 to 3.42
12 - 3.42
13 - 3.42
14 - 3.42
15 - 0.52
16 - 8.40 to 1 (after 3 seconds in loop)
17 - 8.40
18 - 8.40
19 - 5
20 - 5
21 - 0.54
22 - o
23 - 8.40
24 - 8.40
25 - 12.20
26 - 16v
27 - 16v
28 - 16v
 
menatwork

menatwork

New member
U7100
16 - 8.40 to 1v (after 3 seconds in loop)

C7126 - The same
Q7155 - Pin 4 the same

If the the voltage drop from the U7100 pin 16 (CHARGE_BGATE) all the line will drop too. I think the problem is U7100
I'm right, aprendiz dukefawks ?
 
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menatwork

menatwork

New member
dukefawks Can u explain to me, why the voltage drop for 1v and then back to the normal state?
Thats is because the battery is not plugged?
 
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larossmann

larossmann

Administrator
Staff member
The only time anything remotely like this occurred to me was when a PPBUS_G3H high side mosfet was shorted and making PPBUS_G3H 16v. Seeing as your PPBUS_G3H is 8.4v, that is not the case here, so I have no idea either.
 
menatwork

menatwork

New member
larossmann I just get new measurements with battery plugged:

Q7155:
Pin 3-2-1: 8.62v
Pin 4: 1.13V
Pin 5: 8.61v

Right now the voltage dont drop.
Also, i don't get green light.

Do you think could be bad SMC?
 
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