820-2936 B not turning on with adaptor.

[ikelectro]

Not turning on with adaptor but with battery the laptop is turning on,.
And also battery is not charging. I changed the PU7000. PU7000 pin no 14 is 3.3V.
now what should i check?
GREEN LIGHT of mega Safe is there.

[piernov]

Re: 820-2936 B not turning on with adaptor.

Voltage on PPBUS_G3H with AC adapter only, battery disconnected?
Voltage on PM_BATLOW_L with AC adapter only, battery disconnected?
Resistance between pin 27 and 28 of U7000? Resistance between pins 17 and 18 of U7000?

[smali]

Re: 820-2936 B not turning on with adaptor.

CHECK FIRST R6990(47 ohms) then D6990 double diods and also check F6905 and D7005.

[Akinovich]

Re: 820-2936 B not turning on with adaptor.

Why should he check R6990, D6990 and F6905 if magsafe light is there. D7005 makes sense. Trying to learn am i missing anything?

Resistance on R7020 like piernov said

U7000
voltage on pin 2, 3, 13

[smali]

Re: 820-2936 B not turning on with adaptor.

Why should he check R6990, D6990 and F6905 if magsafe light is there. D7005 makes sense. Trying to learn am i missing anything?

Resistance on R7020 like piernov said

U7000
voltage on pin 2, 3, 13

yes you are right....i missed magsafe Green light part in the post....