I have a Dell 15-7559 motherboard Daam9amb8d0 which does not charge the battery.
1. Battery is confirmed good on 2nd identical laptop
2. Dell Charger identified in bios as 130w (Original)
3. Battery recognized in bios Battery is performing normally
4. Bios was updated.
Reading on battery connector
9 -11 = 11.12v
8 =3.3v Checked on scope signal good
7 = 3.3v Checked on scope signal good
6 = 0v with battery 3v without battery. so good
Reading on PU15 charging IC
1-4 = 19v
5=3.3
6=2.7
7-10 = 0v
11-3.3v
12=3.3v
13=1.3v
14=1.19v
15=.32
16=1.05v
17-20 = 11.1v
21=1.02v
22=0v
23=0v
24=6v
25=10.8v
26=11v
27=11v
28=18v
Any ideas
1. Battery is confirmed good on 2nd identical laptop
2. Dell Charger identified in bios as 130w (Original)
3. Battery recognized in bios Battery is performing normally
4. Bios was updated.
Reading on battery connector
9 -11 = 11.12v
8 =3.3v Checked on scope signal good
7 = 3.3v Checked on scope signal good
6 = 0v with battery 3v without battery. so good
Reading on PU15 charging IC
1-4 = 19v
5=3.3
6=2.7
7-10 = 0v
11-3.3v
12=3.3v
13=1.3v
14=1.19v
15=.32
16=1.05v
17-20 = 11.1v
21=1.02v
22=0v
23=0v
24=6v
25=10.8v
26=11v
27=11v
28=18v
Any ideas
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