Macbook Pro A1708 820-00840

[hani002]

i have macbook pro A1708
at first 15 sec all the voltages presents
but after that voltage on L7670 change from 5 to 0
and voltage on L8030 change from 1.2 to 0

[Simplebeans]

Re: Macbook Pro A1708 820-00840

i have macbook pro A1708
at first 15 sec all the voltages presents
but after that voltage on L7670 change from 5 to 0
and voltage on L8030 change from 1.2 to 0

Hey thanks for your post can you please confirm what power adapter you are using? If possible do you have a USB tester available? Just so that we can start by taking some readings.

Also when you say voltages are present for 15 seconds, during this time does the MacBook Pro power on at all?

[hani002]

Re: Macbook Pro A1708 820-00840

thanks
i use orginal macbook pro charger
and i used also by-3200 and the same result.
when use usb amp meter start med 20 v, 0.56 A
and go down to 20v, 0.26A

[hani002]

Re: Macbook Pro A1708 820-00840

i forget increasing to 0.9 A and last go down t0 0.01 A

[Simplebeans]

Re: Macbook Pro A1708 820-00840

thanks
i use orginal macbook pro charger
and i used also by-3200 and the same result.
when use usb amp meter start med 20 v, 0.56 A
and go down to 20v, 0.26A

Thank you so much can you confirm the wattage figure from the power adapter please, you can find this written on the plug.

Also you did not mention what happens when you press the power button? Do you get any reaction from the machine?

When reading the amp meter it should initially start at 5V while it negotiates the power with the MacBook then it will jump to 20V can you please confirm this is happening for you?

[hani002]

Re: Macbook Pro A1708 820-00840

try to connect
but it completely changed
start from 5 to 20 normal
amp increase to 0.26 to 0.6 then return back to 20 0.26 A/ 0.29 A
all voltage stell present , fan spin but no post

[Simplebeans]

Re: Macbook Pro A1708 820-00840

try to connect
but it completely changed
start from 5 to 20 normal
amp increase to 0.26 to 0.6 then return back to 20 0.26 A/ 0.29 A
all voltage stell present , fan spin but no post

Thanks does it stay at 20V all the time while it is plugged in and do the amps drop back to 0.00 at any point? Just to check when you press the power button and observe the fan spin do you see the screen come on or hear the chime sound?

[hani002]

Re: Macbook Pro A1708 820-00840

nothing,

[Simplebeans]

Re: Macbook Pro A1708 820-00840

nothing,

Ok thanks.

Thanks does it stay at 20V all the time while it is plugged in and do the amps drop back to 0.00 at any point?

And how about this?