I've got an nm-a273 / lenovo z 50/70 here and the centre pin of the charger touched positive and blew up the super io. Iv replaced the charge port and the super io and the bios chips. Bios and super io were programmed by the supplier for this board.
The board now turns on and the leds come on when the power button is pressed, but the hard drive doesn't spin up and Lcd does not power on and fan doesn't spin.
I have tested voltages and +5valw is present and so is +valw , but +5vs and +3vs isn't present.
I checked the mosfets q23 and q24 and power is coming into one side but not out of the other.
I have checked the gate on both and there is zero volts on the gate on both.
The gate of the 5vs mosfet is connected to +20vsb, this is zero volts, but if I check pj201 +20vsb is present, it's just not at the gate of q23 and q24
pu301
1-20.17
2-20.17
3-0
4-0.104
5-0.004
6-2.633
7-0.005
8-3.385
9-3.384
10-0.807
11-1.214
12-1.862
13-1.862
14-0
15-0
16-6.00
17-5.79
18-1.856
19-1.8
20-20.17
21-
The board now turns on and the leds come on when the power button is pressed, but the hard drive doesn't spin up and Lcd does not power on and fan doesn't spin.
I have tested voltages and +5valw is present and so is +valw , but +5vs and +3vs isn't present.
I checked the mosfets q23 and q24 and power is coming into one side but not out of the other.
I have checked the gate on both and there is zero volts on the gate on both.
The gate of the 5vs mosfet is connected to +20vsb, this is zero volts, but if I check pj201 +20vsb is present, it's just not at the gate of q23 and q24
pu301
1-20.17
2-20.17
3-0
4-0.104
5-0.004
6-2.633
7-0.005
8-3.385
9-3.384
10-0.807
11-1.214
12-1.862
13-1.862
14-0
15-0
16-6.00
17-5.79
18-1.856
19-1.8
20-20.17
21-
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